No overdubs available after saved the song

I’m on 4.3.0 beta of the Aeros
If I play a song with overdubs I can undo/redo the layers 2X2 Mode
But if I save the song to play it later, there is no overdubs anymore , the track is a whole track
If I undo/redo it’s like a mute/unmute there is no layers on a saved song?

I downgrade to 4.2.4 and is the same . No ovedubs on saved songs in 2X2 mode

Best regards

The overdubs are never available after saving, overdubs must always merge with the base layer when saving. This is integral to how the Aeros works and cannot be changed.

Undoing an overdub and saving is the same as deleting the overdub

Ok thank you