diff --git a/theme/boost/scss/moodle/modules.scss b/theme/boost/scss/moodle/modules.scss
index 44acbff3ab7..8a5927e34c1 100644
--- a/theme/boost/scss/moodle/modules.scss
+++ b/theme/boost/scss/moodle/modules.scss
@@ -1395,6 +1395,8 @@ $popout-header-height: 4rem;
 
 .path-mod-assign [data-region="grade-panel"] .mform .fitem.has-popout .felement {
     width: 100%;
+    overflow: auto;
+    height: calc(100% - 4rem);
 }
 
 .path-mod-assign [data-region="grade-panel"] .mform .fitem .felement {
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index 54578ef8e03..c49fc682d65 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -18862,7 +18862,9 @@ img.userpicture {
   margin: 0; }
 
 .path-mod-assign [data-region="grade-panel"] .mform .fitem.has-popout .felement {
-  width: 100%; }
+  width: 100%;
+  overflow: auto;
+  height: calc(100% - 4rem); }
 
 .path-mod-assign [data-region="grade-panel"] .mform .fitem .felement {
   width: auto; }
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index e8f7ab505dc..9b9981ed712 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -18862,7 +18862,9 @@ img.userpicture {
   margin: 0; }
 
 .path-mod-assign [data-region="grade-panel"] .mform .fitem.has-popout .felement {
-  width: 100%; }
+  width: 100%;
+  overflow: auto;
+  height: calc(100% - 4rem); }
 
 .path-mod-assign [data-region="grade-panel"] .mform .fitem .felement {
   width: auto; }