A “Move queue overflow” error is rare. It is typically related to micro-controller clock synchronization problems. You can take a look at Advanced Trouble-Shooting / Graphing Klipper for some hints on debugging clock synchronization. Unfortunately, I don’t have much additional help I can offer. Note that you’ve modified the Klipper code (at a minimum, some additional code has been added to the extras directory) so it is also possible one of those changes is impacting the system. It’s also possible it is hardware related (for examples, problems with voltages or problems with crystals on the host and/or mcus) - you could also try following the steps at Timeout with MCU / Lost communication with MCU
-Kevin