Audio/video out of sync when exporting with hardware acceleration.

[axelmillar11]

Hi! 

Whenever I try to export a vertical sequence (1080x1920) using hardware acceleration, it renders out of sync. If I export the exact same sequence, using the exact same export preset but with "software only", it renders just fine. My horizontal preset with hardware acceleration for 4K videos works like a charm, so I've no idea why this happens with the vertical settings.

Any idea on how to solve this?

[axelmillar11]

It happens both on Premiere Pro versions 22 and 15, on different computers.