I am having similar issues but the cause is the same. I didn't try disable the macro, I just pulled the dongle out when it was inactive. As soon as it is out of the mix everything works perfect. I have a brand new set up and everything else works great. I spend hours trying to figure out what was wrong with my probe and or my wiring. I am upset that the pendant is malfunctioning but I am very happy that I finally know what is causing the problem.
You say you can't fix it because you can't reproduce it. I am happy to setup a screen share and let anyone login to my computer. It is very very repeatable on my end.
Has anyone tried the 1.211 build with better results?
Did anyone get a chance to try a different dongle or pendant to see if it was a hardware issues?