Hi @Hetzer, Volker,
As per my test, I didn't reproduce this issue on my end.
Apologize in advance If there is anything wrong with my reproducing process, please feel free to let me know.
Also, as per my knowledge there is no related setting which causes this. Have a try to run Word in safe word and test it on other devices. If the issue still persists, I suggest you can open a ticket with Microsoft as this issue seems to be by accident.
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