Kalico, which is a divergent branch of Klipper, has a non-critical mcu flag which will allow MCUs to disconnect from the system without throwing a critical fault and stopping print. Currently it doesn’t work for MCUs on CAN bus but that feature is being discussed.
For example, the config for beacon probe would have this flag allowing it to disconnect during a print without halting the system.
[beacon]
is_non_critical: true
As others have noted, this feature should not be a band-aid fix to ignore MCU disconnects or timer too close errors. It should be a mitigation for failed prints while root cause issues are fixed.
Here is a link to the Kalico documentation site if interested: Kalico Documentation - Kalico Documentation