I’ve been printing for 4 days with the disconnected KNOMI (power is supplied), and there hasn’t been a single disconnect (average print duration 5-6 hours).
Previously, the issue typically occurred around the 3rd hour.
Maybe the problem wasn’t entirely with the CAN bus, and it was just contributing to the issue, which eventually caused a complete failure.
I found a potentially similar problem on Discource, which seems to be unresolved: CAN-Bus suddenly losing connection ~3 Hours into Prints - #2 by VoltexRB