MIDI note stuck

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I just bought a MIDI keyboard. When I play more than one note and release quickly the notes get stuck. The note stops playing when LMMS looses (not changes, just looses) focus or when I repress it.

I am on Linux, using Jack and LMMS 1.2.2. I can also reproduce the problem in LMMS 1.3.0-alpha1.33.
I couldn't reproduce it using other programs that can take input from MIDI (I tried Dexed).
When I route MIDI through MIDI thru plugin in Carla it shows that I am not pressing any buttons, but LMMS is playing notes. All of this makes me think that it is LMMS issue
First off, Welcome to the Forum void !
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void wrote:
Wed Apr 21, 2021 10:37 pm
I just bought a MIDI keyboard. When I play more than one note and release quickly the notes get stuck. The note stops playing when LMMS looses (not changes, just looses) focus or when I repress it.

I am on Linux, using Jack and LMMS 1.2.2. I can also reproduce the problem in LMMS 1.3.0-alpha1.33.
I couldn't reproduce it using other programs that can take input from MIDI (I tried Dexed).
When I route MIDI through MIDI thru plugin in Carla it shows that I am not pressing any buttons, but LMMS is playing notes. All of this makes me think that it is LMMS issue
Almost sure we talked on Discord earlier :P
I would like to know if you only had that issue when you used Carla, or if you also can get stuck keys with default instruments, and also how it works with tested VSTs
Here i would like you to test with this;
MDA-Piano http://mda.smartelectronix.com/synths.htm
It is very small in size, and you can just copy its dll to your VST-folder. Further its a quite good piano-instrument, so it is a win win
Lets know the outcome :)