Bug (Retrolemmini 3.0) - Lemmings get trapped at the top of the level

[hrb264]

Hi - I've noticed this happening on and off before but in Retrolemmini 3.0 there seems to be a bit of an issue with lemmings getting trapped at the top of the terrain even when their feet are still visible. I've just been trying to complete Gigalems 'into the furnace' and I have been having some issues with it because of this. I've attached my replay.

It could be that this is part of the game but I don't remember it happening before if so? Would anyone be able to take a look?