@timschneider I'll grab that as soon as I can. That machine is offline for an unrelated issue ATM.
@chrishamm I'll try that in addition to the SD card and discrete ground wiring. We actually just got in a SanDisk Extreme PRO card rated A2 yesterday, and I already have the previous A1 card cloned onto it.
I did notice that it says "unless you are using a recent DuetPi build (after 06/07/2022), it is recommended to disable it". We are running what I believe is the latest build (2023-09-06), is this already done/would it make a difference?