This was found in another thread of mine, but I wanted to give it its own for clarity and because I need it addressed for what I'm doing, haha.
If you have a combo box derived from a SharePoint Choice column single select and in the drop down you re-select the item that was already selected, it will deselect the item but not change the UnSaved property to true. This doesn't happen with a multi-select column.
I'm assuming it's a bug, but if it's a feature, how would I get the property to change for this specific situation?
Thanks for reporting this bug - I'll communicate it to the team that owns that control for fixing it.
For now, if you select the "x" button at the selection of the combobox then you can "unselect" the item, but if you click on the selection in the dropdown, then you'll experience the bug that you reported.