src/boot/qformMixin.js

@@ -1,4 +1,5 @@
-import { QTable, QForm } from 'quasar';
+import { QForm } from 'quasar';
+import { getCurrentInstance } from 'vue';
 
 export default {
     inject: { QForm },
@@ -6,7 +7,8 @@ export default {
     components: { QForm },
     extends: { QForm },
     mounted: function () {
-        if (this.$el?.classList?.contains('q-form'))
+        const vm = getCurrentInstance();
+        if (vm.type.name === 'QForm')
             if (this.$el?.id !== 'searchbarForm') {
                 let that = this;