LibreOffice Calc, typing in a cell constantly overwrites the same character over and over?

I have a related problem. From time to time Libreoffice switches randomly in replace mode while typing inside of a cell. It might be related to special characters in the german (ö,ä etc.) but it ist not reproducible.
It is definitely not related to the toggle insert/ replace button.

Then open a new topic and put a link to this thread, if you think it is related. You may have noticed @marctremblay don’t like other topics in “his” thread:

You’re entitled to being wrong and make a fool of yourself by quoting me completely out of context, but know that I don’t appreciate you trying to make me look like an idiot. Read the thread and then perhaps you’ll understand the context of the sentence that you blindly quoted (or perhaps not).

In any case, please refrain from speaking for me, especially if you’re going to arrogantly warp my quotes. After seeing Wanderer’s reply, I’m now 100% sure this forum is definitely not a place to report bugs. Looks like a kindergarten.

You are absolute correct, this is not the place to report bugs. See This is the guide - How to use the Ask site? - #3 by Hrbrgr

The correct place has already been posted here, How to Report Bugs in LibreOffice - The Document Foundation Wiki

But please report the bug number back here

AFAIK nobody has bothered to report a bug yet.

Check the context yourself. I quoted from your reaction to the first “similiar problem” question by s-light1. So I guess it fits as a warning for the next questioneer.