Set the dropdown width only when the dropdown is opened, to fix a bug where it would get set before the DOM element actually rendered. The settings field is collapsed by default (on new installations), so the computed DOM width would be invalid

ui/media/js/searchable-models.js

@@ -509,8 +509,11 @@ class ModelDropdown
         this.modelList.addEventListener('mousemove', this.bind(this.highlightModelAtPosition, this))
         this.modelList.addEventListener('mousedown', this.bind(this.processClick, this))
 
-        let modelFilterStyle = window.getComputedStyle(this.modelFilter)
+        let mf = this.modelFilter
-        rootModelList.style.minWidth = modelFilterStyle.width
+        this.modelFilter.addEventListener('focus', function() {
+            let modelFilterStyle = window.getComputedStyle(mf)
+            rootModelList.style.minWidth = modelFilterStyle.width
+        })
 
         this.selectEntry(this.activeModel)
     }