Crash when using midi output

[DjBumper]

Hi,

i am using qlc 4.11.2 with attached workspace and fixture definitions (I modified AT3).

During our event I got a couple of crashs (QLC closes). After the event I tried to reproduce the issue:

I am using a loopbackk midi Device on Linux Ubuntu 18.04 to forward some triggers to another software. The other software has no impact on the issue. I get the error without starting the other software. The midi out is assigned on universe4.
Reproduce the issue (only software, no hardware connected)
I activate the loopback device with 'sudo modprobe snd-virmidi'.
Then I start qlcplus. When activating the three functions 'Kreis','C','M' (all in the center of the virtual console) you have to wait some time (i did testing over night) - it could last for hours until QLC crashes. I testet on 2 different PCs.

When not using the midi functions the workspace seems to be ok.

I will continue to try to find out the exact setup for reproducing the error.

Greetings from Germany