Motif 2 playing too high notes

[LiquidSpaceman]

Thanks for the replies!

@Smoky
The connections are like this:
MIDI A -> Digitakt (only used for tempo and start/stop)
MIDI B -> Quad midi splitter -> Volca Bass (Drone), Volca FM (Motif 1), Volca Keys (Motif 2) and Deepmind 12 (Pad)
Nothing on USB.
Nothing on MIDI A or B IN.
So don't believe that's it.

@Darryl
Just tried the workaround there, but unfortunately it doesn't change anything.