Strange zone behaviour and calculation

[Gorazd]

Hi. Suddenly, some zones have starting to behave strange. Area calculation is wrong (there should be 47,85) and some strange dots have appear on the corners. This happend, when I have updated zones. Three thicker walls are custom profile, so maybe it is because of them?? All zones on a project got this strange dots, but not all have wrong area. The problem is, I dont know which, and deleting and creating them again doesnt fix the problem. I have used the Inner edge recognitin method.

Any hint?