Autocancel Turn mechanics?

[SadFlyersFan]

I've been practicing auto-cancel bair-ing across the stage but I have some questions about the timing, after my second or third jump i'll always land and f-tilt or f-smash. The jump input just doesn't register after the autocancel. Is this my input issues or is there a mechanic I don't know about messing with the autocancel?

 

[Masondeanm]

When you do a regular land, you still have 4 frames of lag, and when you auto-cancel, that's just the same as a regular land. You're pressing jump during these 4 frames so it's not registering, and then when you do the input for your aerial you just get a grounded move.