"Reset Search" button does not reset search parameters on the screens with big amount of items. Examples of the screens:
Operations -> Orders -> Add new order -> Order Additional Resources -> Choose Category
System > Settings > Notifications > Notification Templates > Clone Existing Template
After pressing "Reset Search" button the list of items remain the same.
The issue is caused by a bug with ID #PBA-61022(""Reset Search" does not always work on the lists with more than 100 items")s.
Click "Refresh" button in the top right corner of the Control Panel screen to clear the search.