A list of KNOWN version exclusive bugs can be found below

Chicken duplication - There is a way to trick the game into thinking you have saved more chickens than you actually have and unlocking the portal/next level early. This is under investigation and planned to be patched in future versions so any use of this bug will result in the run being deemed invalid.

This mod features a fall back softlock prevention check, in the event this triggers during a run then it will result in the run being deemed invalid.

In some cases the mod would not correctly reset the saved chicks per level, this is thought to have been resolved