New Tracks losing BPM/Grid Lock

When i close Traktor, the last tracks loaded in each deck lose their BPM lock. This happens each and every time, even if i manually unload the decks first. The only way around this issue is to load a track without a BPM lock into every deck i used. This is really easy to reproduce. It has so far happened with every iteration of 3.5+

 

Hey there,
We are unable to reproduce this bug on our end. Could you perhaps give us details of your set up and a video of the bug when you have the time?
Thank you.

 

Sadly i can't record. I have to dig up the specs. It's a couple of years old Win10 machine for sure. Anyway, i found the culprit, which really surprised me. I am using an S4Mk3. It seems the moment Traktor severs the connection to the S4, right before closing, i can see the symbol for BPM lock in the playlist disappearing. So i tried simply switching off the S4 (after loading a track of course). Voila: Switching off the S4 without closing Traktor also untoggles the BPMLock. Furthermore, if i leave the S4 unconnected and start Traktor, load a track with BPMLock and close it again, the lock stays on, as it should.
Thank you for trying to reproduce it. Looks like the S4Mk3 is at fault. I wonder if it's only my device. And i wonder how on earth it can signal Traktor to unlock when signing off...
I will investigate further.
P.S. I don't own a camera.


Edit: 1 minute more work and i have isolated the cause. It's the mapping assignment "Analysis Unlock (Browser, List)" used with an override and inverted. The signal to Traktor is possibly from the button i mapped it to. You still may want to try and reproduce it. This bug might apply to other device/command combinations that are better avoided.