Warning about input error gets lost on redo after undo

[mstammberger]

When the user made an input error (same number on a row or column) the input error warning is shown:

Then press the Undo button: the wrong input is removed.
After that press the Redo button: the wrong number comes back, but the input error warning is gone:

Expected behaviour: The input error warning should also come back.

Edit:
Forgot to mention the used version which is 3.1.1.