For what it’s worth, running a bit over full is not going to hurt anything. If anything its an aid, within reason of course.
The odds of a dipstick problem here are just about zero but an incorrect dipstick can be a problem if an error has been made by someone during the factory assembly or at some point during the past maintenance history.
We had a Subaru come in once with a manual transmission that was seized up due to a now purple mainshaft rear bearing. The trans had recently been rebuilt in Colorado and the stick showed the gear oil was on the FULL mark. It was actually about a quart down and extended driving had oil starved that bearing which led it to seize up. (The car had been trailered to OK when the couple moved here right after having the transmission rebuilt.)
I discovered that the Subaru shop in CO had used an automatic transmission final drive dipstick which was about an inch longer than the stick for a manual transmission and which in turn provided an erroneous FULL reading as the mark sat lower in transmission.
My fuzzy memory seems to remember this happening with an engine oil dipstick at one time but I cannot remember the details behind that one. It seems that the stick was longer and was leading to overfilling of the crankcase.