Although I probably cannot provide specific assistance, can you describe how it is crashing? For instance, is the VNC connection still active? Do you see Kstars disappear, or does Ekos just disappear? If you run "ps -aux" from a terminal do you see kstars? If you restart kstars/ekos after the crash, does it seem to reconnect to all equipment? Immediately after a crash, if you run "dmesg" from a terminal, what does it say?
I fought with my QHY 163M for a year, and it seems more stable now. I don't know how mature the drivers are for the 128.