Trouble with midi realtime note entry: double bass (bowed) (please check if reproducable)

Hi,

I try to engrave music for a bowed double bass and I encounter the following problem which isn't there when I choose other Instruments:

When trying to enter notes with realtime midi when there is a doublebass (bowed instruments) in the score, the notes seem to get stuck and the metronome is going on as if i hadn#t released the kef off my midi-Piano. So after some note changes i just have clusters of notes and there is no control about any length of note.

with other Instruments I have no problem. If I open/start a score with piano/banjo/guitar... no problem with the realtime midi note entry mode, just with the bowed doublebass.

Maybe somebody can check if he has the same on his version?
Just open a new score with CHOOSE INSTRUMENT - BOWED - DOUBLE BASS
and try out the realtime note entry mode for me it doesn't work, but it works with other Intruments really good...

Me using:
OS: Linux Mint 20.1,
Arch.: x86_64,
MuseScore version (64-bit): 3.6.1.515740129,
revision: d0fc8e9
and the Alesis V49 Midi-Keboard