The only errors I see in the log are related to websocket connection being closed and this one very specific error from klipper.
| Recv: // MCU 'mcu' spontaneous restart
I also see your log flooded with 409 API repsponses for printer being disconnected, which is typically an external tool connecting to octoprint like cura (with the OctoPrint connection plugin installed) or OctoDash or something similar.
pi3b, skr e3 mini 2209, uart connection (without usb) short cable, klipper at 250k baud. True power (2A) for pi, 10A 12v for other, bed 220v. No another problem on printer.
force_turbo=1 in cfg. Have radiator and fun for pi, temp <55
have cura with this plugin, have octodash. If octoprint in 100% (>100%) cpu mode, no answers to any.
3-5 seconds freeze always present in fast zigzag fill, as on screenshot link above. Only in this fill, no freezes more.