Yes, it is increasing and is actually well known (in some circles) for behavior. There is some problem with measuring the font (we’ll probably choose a replacement font instead).
Instead of setting the size to fixed, I would use the TableLayoutPanel as the layout manager for this control / form / independently and let it actually resize. You need to play a little with it, but from my experience an empty column of distance is added (provided that you have at least one percentage column). This is a bit complicated, but I managed to fix a similar defect in this way.
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