I have a blackmagic decklink HD Exreme..
Acctualy I’m just using it to monitor audio output..
Video Playback is set to none, and Video Output, off.
Audio playback – blackmagic audio.
It’s not 2 seconds, but about 28, 29 frames. Happens sometimes (almost all)..
The audio scrubbing scrubbs after these 28,29 frames too..
thsnks