mi-Rack not shutting down properly

[hexdump0815]

hello,

last issue for now :) ... when stopping Rack i have to ctrl-c it by hand in the terminal where i started it - it does not finish properly on its own - the last lines of output are:
...
[0.801 info] Loaded SVG ./res/ComponentLibrary/NKK_2.svg
[0.802 info] Loaded SVG ./res/ComponentLibrary/CL1362.svg
[3.864 info] Saving patch ./autosave.vcv
[3.866 info] Saving settings ./settings.json

and if i had some patch running additionally:

[3.866 info] Stopping RtAudio stream 2
[3.981 info] Closing RtAudio stream 2

and then it hangs ...

a lot of thanks in advance and best wishes - hexdump