Hey Mark..
I tried your config settings and got 0000.73 & 0000.83 sigkill err.. (if I flip through visuals it happens the moment I hit Borgbeat)
But only with the Borgbeat visual... [3d cube] so far I can't seem to get the other visuals to produce this...

Do the error codes translate to anything meaningful?

I am ok with not running borgbeat if that is the culprit... but I think I need to keep watching it closely... a new behavior I have seen is after the error the visual now comes back... this is different and harder to catch as if I don't see it fail and reload, I will miss the error altogether.