Editor freezes when creating a Collection named 'AUX'

When a collection is created, naming the colleciton AUX causes the editor to lock up, requiring a force close from the task manager.

Note:
Naming the collection something else and then renaming it to AUX fails to rename and gives the error shown in the screenshot.

1. Open UE4 Editor (any project)
2. In the Content Browser, click View Options and enable Show Collection
3. In the Content Browser sources panel, click the plus button to add Local Collection
4. Name the collection 'AUX' and press enter

Result:
Editor locks up without a crash. This requires closing the editor from the task manager

Expected:
Editor accepts the collection name and continues running. Or, if AUX is a restricted name, editor warns that AUX cannot be used as a name.