(edit: i was using wadsmush) i just played doom 2 from map 01 and finishing map 19. i did find a few errors:
-map 31 got a fishing quest, but the only liquid is a water ceiling i cannot fish on because the fishing beaver is floor-only
-map 32 keens and tag 666
-map 16 photo quest destination in the hidden teleport area where the monsters wait until they can hear you
-map 18 missing textures https://imgur.com/a/r66oD
-map 19 missing textures https://imgur.com/a/En8EH
-map07 ticks and traps crash on launch: https://imgur.com/a/Ww0gH
(also, not really a bug per se, but on map 06 a texture was selected by the quest. but that texture was a super obscure placement as the bottom of 3 different doors essentially obscuring the majority of the texture. so unless you dragged it into an editor and searched for the sector the quest was looking for you would not know where it was)