Leveling character instantly kills them

[Former user]

This seems to only happen to low toughness characters.

To test:

Create a new character with 10 toughness and use wish 'xp:5000' - character dies instantly

[Steve Pringle]

With a new character with 10 toughness, this seems to happen when they level up from level 5 to 6.

[Grrfaw WorldWide]

While leveling an 18T character from 5 to 6, my HP was reduced, to an amount reflecting only starting HP and Toughness bonus. Random hp I had gained from previous levels disappeared. sounds like its caused by the same thing as OP

[Brian Bucklew]

fixed