diff --git a/src/web/stylesheets/components/operations/_operations.css b/src/web/stylesheets/components/operations/_operations.css
index cfdaed9f..4e10f13d 100644
--- a/src/web/stylesheets/components/operations/_operations.css
+++ b/src/web/stylesheets/components/operations/_operations.css
@@ -35,6 +35,7 @@
 @media only screen and ( min-width: 768px ){
     #operations-dropdown {
         border-bottom: none;
+        border-top: 1px solid var(--primary-border-colour);
     }
 
     /* On desktop UI, the categories are always visible */
diff --git a/src/web/waiters/WindowWaiter.mjs b/src/web/waiters/WindowWaiter.mjs
index c30938a6..616d7500 100755
--- a/src/web/waiters/WindowWaiter.mjs
+++ b/src/web/waiters/WindowWaiter.mjs
@@ -53,6 +53,9 @@ class WindowWaiter {
     onResizeToDesktop() {
         this.app.setDesktopUI(false);
 
+        // disable app popovers on li.operation elements
+        $(document.querySelectorAll("li.operation")).popover("enable");
+
         // if a window is resized past breakpoint while #recipe or #input is maximised, close these maxed panes
         ["recipe", "input"].forEach(paneId => this.manager.controls.setPaneMaximised(paneId, false));
 
@@ -66,6 +69,9 @@ class WindowWaiter {
     onResizeToMobile() {
         this.app.setMobileUI();
 
+        // disable app popovers on li.operation elements
+        $(document.querySelectorAll("li.operation")).popover("disable");
+
         // when mobile devices' keyboards pop up, it triggers a window resize event. Here
         // we keep the maximised panes open until the minimise button is clicked / tapped
         ["recipe", "input", "output"]