diff --git a/addons/web_editor/static/src/js/editor/snippets.options.js b/addons/web_editor/static/src/js/editor/snippets.options.js
index a0658a71ee1..e88900cbc57 100644
--- a/addons/web_editor/static/src/js/editor/snippets.options.js
+++ b/addons/web_editor/static/src/js/editor/snippets.options.js
@@ -1963,12 +1963,21 @@ const ListUserValueWidget = UserValueWidget.extend({
         if (this.createWidget) {
             const selectedIds = currentValues.map(({ id }) => id)
                 .filter(id => typeof id === 'number');
-            const selectedIdsDomain = ['id', 'not in', selectedIds];
+            // Note: it's important to simplify the domain at its maximum as the
+            // rpc using it are cached. Similar domains should be written the
+            // same way for the cache to work.
+            const selectedIdsDomain = selectedIds.length ? ['id', 'not in', selectedIds] : null;
             const selectedIdsDomainIndex = this.createWidget.options.domain.findIndex(domain => domain[0] === 'id' && domain[1] === 'not in');
             if (selectedIdsDomainIndex > -1) {
-                this.createWidget.options.domain[selectedIdsDomainIndex] = selectedIdsDomain;
+                if (selectedIdsDomain) {
+                    this.createWidget.options.domain[selectedIdsDomainIndex] = selectedIdsDomain;
+                } else {
+                    this.createWidget.options.domain.splice(selectedIdsDomainIndex, 1);
+                }
             } else {
-                this.createWidget.options.domain = [...this.createWidget.options.domain, selectedIdsDomain];
+                if (selectedIdsDomain) {
+                    this.createWidget.options.domain = [...this.createWidget.options.domain, selectedIdsDomain];
+                }
             }
             this.createWidget.setValue('');
             this.createWidget.inputEl.value = '';