Doors no longer work properly in Doomsday 1.14.5
It seems that switches don't always open the doors anymore. I don't know if that is in the door logic or the saved game files. I upgraded from 1.13x mainly because of the star stairs issue. But now, in some game sessions, not all doors will open, and the only fix seems to be start from the beginning.
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I might also want to try installing other versions between the latest and the one I had before in case it is a regression.