Preserving credentials on authentication failures

On my local Windows machine I maintain a credential store in the form of a
text file. But from time to time one of the entries disappears. I run
regularly some background jobs, cloning some stuff, and I suspect this
happens when the external authentication service is down temporarily. When
it is later resumed, I can't clone the repo anymore because of that deleted
entry.

Is there any option to keep entries on authentication failures? Or is this
simply a bug? Or is there another reason why this happens?

Git 2.35.1.windows.2

Thanks, Jan