Does Djay Pro AI have this? I use this effect religiously. It should be tied to the global BPM (like in Traktor) and not to the individual deck (like on Engine OS).
I need to hold onto a loop as a temporary 3rd channel on a 2 deck mixer. It’s way better and less limiting than recording a sample (and even then djay pro limits samples to 4 beats!), loading it and managing it via the sampler controls. Just engaged the loop roll at full amount and dial it back as you introduce the new track.