@artfwo - i can repro with both m4l AND monome patches for max7.

If i use test grid from the BEAP collection, i also get the same results - essentially all looks good, things are checking out - and then wam - nothing, occasionally the /key data still works but /led and /tilt are completely frozen.

I was thinking that next up i could install a much older version of serialosc that still required the bonjour service or something to that effect and try on this same exact setup… but i am open to ideas.