Deleted custom event restricts name use on other fucntions/variables

If a custom event has been deleted, the name used on that custom event will not be able to be used on other functions/variables. This can be seen on the video posted here;

[Link Removed]

[Could not reproduce internally]

1. Open Editor (any project)
2. Open any blueprint
3. Create a custom event, name "test"
4. Delete custom event
5. Create new function, name "test"

Results:

Error appears - "test is in use by another variable or function"

Expected:

Function renames to test and no error appears.