Anyone using CUBASIS 3.7 on Samsung S7FE and external MIDI with success?

I run CUBASIS 3.7 on Samsung Tablet F7SE.

While other apps like FL mobile detect MIDI-Hardware connected via OTG-USB CUBASIS fails.
Any one using the same tablet?
Any idea how to fix this issue?
Everything works perfect on a Samsung Tablet a9+ btw …

Thnx in advance!