diff --git a/dmoj/urls.py b/dmoj/urls.py
index e7c62cf..bece26c 100644
--- a/dmoj/urls.py
+++ b/dmoj/urls.py
@@ -84,6 +84,7 @@ from judge.views.select2 import (
     TicketUserSelect2View,
     UserSearchSelect2View,
     UserSelect2View,
+    ProblemAuthorSearchSelect2View,
 )
 
 admin.autodiscover()
@@ -887,6 +888,11 @@ urlpatterns = [
                                 AssigneeSelect2View.as_view(),
                                 name="ticket_assignee_select2_ajax",
                             ),
+                            url(
+                                r"^problem_authors$",
+                                ProblemAuthorSearchSelect2View.as_view(),
+                                name="problem_authors_select2_ajax",
+                            ),
                         ]
                     ),
                 ),
diff --git a/judge/views/problem.py b/judge/views/problem.py
index 7ba04ab..d86909a 100644
--- a/judge/views/problem.py
+++ b/judge/views/problem.py
@@ -664,12 +664,6 @@ class ProblemList(QueryStringSortMixin, TitleMixin, SolvedProblemMixin, ListView
 
         if self.request.profile:
             context["organizations"] = self.request.profile.organizations.all()
-        all_authors_ids = Problem.objects.values_list("authors", flat=True)
-        context["all_authors"] = (
-            Profile.objects.filter(id__in=all_authors_ids)
-            .select_related("user")
-            .values("id", "user__username")
-        )
         context["category"] = self.category
         context["categories"] = ProblemGroup.objects.all()
         if self.show_types:
@@ -677,7 +671,7 @@ class ProblemList(QueryStringSortMixin, TitleMixin, SolvedProblemMixin, ListView
             context["problem_types"] = ProblemType.objects.all()
         context["has_fts"] = settings.ENABLE_FTS
         context["org_query"] = self.org_query
-        context["author_query"] = self.author_query
+        context["author_query"] = Profile.objects.filter(id__in=self.author_query)
         context["search_query"] = self.search_query
         context["completed_problem_ids"] = self.get_completed_problems()
         context["attempted_problems"] = self.get_attempted_problems()
diff --git a/judge/views/select2.py b/judge/views/select2.py
index 187d68a..1aea075 100644
--- a/judge/views/select2.py
+++ b/judge/views/select2.py
@@ -200,3 +200,17 @@ class ChatUserSearchSelect2View(UserSearchSelect2View):
             ),
             "display_rank": display_rank,
         }
+
+
+class ProblemAuthorSearchSelect2View(UserSearchSelect2View):
+    def get_queryset(self):
+        return Profile.objects.filter(
+            authored_problems__isnull=False, user__username__icontains=self.term
+        ).distinct()
+
+    def get_json_result_from_object(self, user_tuple):
+        pk, username, email, display_rank, profile_image = user_tuple
+        return {
+            "text": username,
+            "id": pk,
+        }
diff --git a/resources/base.scss b/resources/base.scss
index 501d5a1..aee3a97 100644
--- a/resources/base.scss
+++ b/resources/base.scss
@@ -739,11 +739,6 @@ math {
     z-index: 1000 !important;
 }
 
-select {
-    visibility: hidden;
-    max-height: 0;
-}
-
 // @media (max-width: 500px) {
     //     #notification {
         //         margin-top: 0.6em;
diff --git a/resources/problem.scss b/resources/problem.scss
index d10c50e..ff2d615 100644
--- a/resources/problem.scss
+++ b/resources/problem.scss
@@ -324,10 +324,6 @@ ul.problem-list {
     padding: 4px 10px;
 }
 
-#category, #types {
-    visibility: hidden;
-}
-
 #filter-form .form-label {
     margin-top: 0.5em;
     font-style: italic;
diff --git a/templates/chat/chat_js.html b/templates/chat/chat_js.html
index e259b87..fee3984 100644
--- a/templates/chat/chat_js.html
+++ b/templates/chat/chat_js.html
@@ -522,7 +522,9 @@
     $('#search-handle').select2({
       placeholder: '<i class="fa fa-search"></i> {{ _('Search by handle...') }}',
       ajax: {
-        url: '{{ url('chat_user_search_select2_ajax') }}'
+        url: '{{ url('chat_user_search_select2_ajax') }}',
+        delay: 250,
+        cache: true,
       },
       minimumInputLength: 1,
       escapeMarkup: function (markup) {
diff --git a/templates/contest/media-js.html b/templates/contest/media-js.html
index 9016b7d..5a72e4c 100644
--- a/templates/contest/media-js.html
+++ b/templates/contest/media-js.html
@@ -161,7 +161,9 @@
     $('#search-contest').select2({
       placeholder: placeholder,
       ajax: {
-        url: '{{ url('contest_user_search_select2_ajax', contest.key) }}'
+        url: '{{ url('contest_user_search_select2_ajax', contest.key) }}',
+        cache: true,
+        delay: 250,
       },
       minimumInputLength: 1,
       escapeMarkup: function (markup) {
diff --git a/templates/contest/ranking.html b/templates/contest/ranking.html
index baea8db..237cd5b 100644
--- a/templates/contest/ranking.html
+++ b/templates/contest/ranking.html
@@ -128,12 +128,14 @@
 
 {% block before_table %}
   {% include "contest/contest-datetime.html" %}
-  <div style="margin-bottom: 0.5em">
-    {% if page_type == 'participation' %}
-      {% if contest.can_see_full_scoreboard(request.user) %}
+  {% if page_type == 'participation' %}
+    {% if contest.can_see_full_scoreboard(request.user) %}
+      <div style="margin-bottom: 0.5em">
         <input id="search-contest" type="text" placeholder="{{ _('View user participation') }}">
-      {% endif %}
+      </div>
     {% endif %}
+  {% endif %}
+  <div style="margin-bottom: 0.5em">
     <input id="show-schools-checkbox" type="checkbox" style="vertical-align: bottom">
     <label for="show-schools-checkbox" style="vertical-align: bottom; margin-right: 1em;">{{ _('Show schools') }}</label>
 
diff --git a/templates/problem/list-base.html b/templates/problem/list-base.html
index 181a48a..3a747b7 100644
--- a/templates/problem/list-base.html
+++ b/templates/problem/list-base.html
@@ -90,7 +90,15 @@
           .css({'visibility': 'visible'});
         $('#search-org').select2({multiple: 1, placeholder: '{{ _('Groups') }}...'})
           .css({'visibility': 'visible'});
-        $('#search-author').select2({multiple: 1, placeholder: '{{ _('Authors') }}...'})
+        $('#search-author').select2({
+          multiple: 1,
+          placeholder: '{{ _('Authors') }}...',
+          ajax: {
+            url: '{{ url('problem_authors_select2_ajax') }}',
+            delay: 250,
+            cache: true,
+          }
+        })
           .css({'visibility': 'visible'});
 
         // This is incredibly nasty to do but it's needed because otherwise the select2 steals the focus
diff --git a/templates/problem/search-form.html b/templates/problem/search-form.html
index 53c9e84..97a3c35 100644
--- a/templates/problem/search-form.html
+++ b/templates/problem/search-form.html
@@ -49,9 +49,9 @@
       <div class="filter-form-group">
         <label class="bold-text margin-label" for="type"><i class="non-italics">{{ _('Author') }}</i></label>
         <select id="search-author" name="authors" multiple>
-          {% for author in all_authors %}
-            <option value="{{ author.id }}"{% if author.id in author_query %} selected{% endif %}>
-              {{ author.user__username }}
+          {% for author in author_query %}
+            <option value="{{ author.id }}" selected>
+              {{ author.username }}
             </option>
           {% endfor %}
         </select>
diff --git a/templates/submission/list.html b/templates/submission/list.html
index 53e63ce..b4ab3a8 100644
--- a/templates/submission/list.html
+++ b/templates/submission/list.html
@@ -275,10 +275,6 @@
       col.sub-info, td.sub-info {
         width: 78%
       }
-
-      #status, #language {
-        visibility: hidden;
-      }
     </style>
   {% endif %}
 
diff --git a/templates/ticket/list.html b/templates/ticket/list.html
index cd07280..16d1e8e 100644
--- a/templates/ticket/list.html
+++ b/templates/ticket/list.html
@@ -193,6 +193,8 @@
               }
             };
           },
+          delay: 250,
+          cache: true,
         },
       };
 
diff --git a/templates/user/base-users-js.html b/templates/user/base-users-js.html
index d162f24..e84685a 100644
--- a/templates/user/base-users-js.html
+++ b/templates/user/base-users-js.html
@@ -9,7 +9,9 @@
     $('#search-handle').select2({
       placeholder: '{{ _('Search by handle...') }}',
       ajax: {
-        url: '{{ url('user_search_select2_ajax') }}'
+        url: '{{ url('user_search_select2_ajax') }}',
+        delay: 250,
+        cache: true,
       },
       minimumInputLength: 1,
       escapeMarkup: function (markup) {