I’m running Cubasis 3 on a 2017 iPad Pro 12.9" running iPadOS 15.7.1
I have been making recordings with myself singing over a backing track playing on track 1.
Track 2 contains my lead vocal. Track 3 has my lead vocal punch-ins.
I go to mixdown and when it finishes mixing down, I listen to the mix. Maybe about 1/3rd into the song I can hear my vocals starting to lag behind the music. It gets worse as the song goes on until my singing is a whole beat late. I first noticed this issue a couple weeks ago.
The problem persists no matter which audio type I mix down to (.m4a, .wav, flac).