[Bug][Player] Missing preassigned skills after level select

[Nepster]

Steps to reproduce this bug:
1) Start a level with a hatch, that has preassigned skills.
2) Observe that the lemmings have the correct permanant skills assigned to them, when they drop out of the hatch.
3) Optional: Do some terrain modification, like digging or bashing somwhere
4) Open the in-game level selection menu (usually F2) and press "Cancel" to continue the current game
5) Optional: First notice that your terrain modifications are gone.
6) Then notice that the lemmings spawning now do no longer have the preassigned skills. Alternatively it may rarely happen that all objects turn invisible and that the lemmings now spawn as swimming-floating-gliding zombies.
7) If you use some backwards frame-steps, your terrain modifications will reappear (as the save-states do have the correct information)
8) But even if you framestep back to the beginning of the level, the preassignments never reappear.

Exiting the level and starting it new fixes all the problems.

[nin10doadict]

Oh my. That's... quite the thing.

Some additional information: I was having trouble reproducing this at first because I had another command mapped to F2 (load state, which was likely a default as I never used it). Only by unassigning this command could I open the level menu while playing to reproduce the glitch.

[namida]

I'll check if this was ever fixed. If not, I'll likely just disable the level select menu while in-game, unless a fix is fairly simple.

EDIT: This occurs because the selected level in the menu gets loaded into memory. Even if it's the same level, parts of the data likely get loaded in a different location. Solution: Either rewrite how the level select menu works, or - much more simple - just don't allow opening it while in-game.