diff --git a/web/css/resolver-main.css b/web/css/resolver-main.css
index 37b9303..1dcae0c 100644
--- a/web/css/resolver-main.css
+++ b/web/css/resolver-main.css
@@ -986,6 +986,8 @@
     width: 104px;
     height: 50px;
     contain: layout style;
+    /* Keep the fixed-size source group on a compositor layer during pane resizing. */
+    will-change: transform;
 }
 
 .mr-missing-source-dot {