I noticed that when I went to put a repository offline, right after I went to navigate away, I got a discard changes prompt.
On repro attempt, I noticed when I unselected any checkboxes on the form, the save buttons remain enabled and the discard prompts fire.
If you discard however, you will return to a screen where everything is saved NOT discarded.
This is pretty confusing.
See attached movie, let me know if unclear.
It's even more confusing that it does not appear to affect the opposite way (selecting checkboxes) or using other field types (that I saw/tried).
While I originally saw this on repository, I was able to reproduce using Capabilities, so it's not repository specific.
I did not check older NX3 or NX2 at this time.
Test done with debug off.