added dragstop listener and dragStop method

src/plugins/condition/components/Condition.vue

@@ -31,6 +31,7 @@
                   :class="{ 'is-enabled': !domainObject.isDefault }"
                   :draggable="!domainObject.isDefault"
                   @dragstart="dragStart"
+                  @dragstop="dragStop"
                   @dragover.stop
             ></span>
             <span
@@ -246,6 +247,9 @@ export default {
             e.dataTransfer.setDragImage(e.target.closest('.c-c-container__container'), 0, 0);
             this.$emit('setMoveIndex', this.conditionIndex);
         },
+        dragStop(e) {
+            e.dataTransfer.clearData();
+        },
         destroy() {
         },
         removeCondition(ev) {