Versions:

• Minecraft (1.20.1)
• Fabric (0.15.6)
• Fabric API (0.91.0)
• Automobility (0.4.2)

Recreation:

• Create a default superflat world
• Spawn any pre-fab in Creative
• Attempt to drift by holding space

Logs

Using this same set-up, creating a normal world allows drifting normally. Same with the Tunneler's Dream preset- the only one affected, as far as I'm aware, is the classic superflat preset. I attempted to downgrade Fabric and the API and neither solution worked.

This has also been happening to me, have you found any way to fix it yet?

This also happens to me in forge 1.20.1

This also happened to me and i found a fix

when you create a superflat world u spawn at the Y-60 Level and i think its not coded so it can work under Y 1

but if they can fix it, it would be perfect for drift maps