Running 7.2.rc1 when we import a large address list (16125 records) the CPU usage goes up to 40-50% and after a period of time we lose access to the router via winbox and then we are unable to ping the router. downgrading to 7.1.1 with the same address list the CPU is 4-10%. I have factory reset the router (no config installed) and only imported the addresses same result.
also when it crashes on reboot we have no routes
jan/13/2022 11:17:55 system,error,critical router was rebooted without proper shut
down
jan/13/2022 11:17:55 system,error,critical kernel failure in previous boot
jan/13/2022 11:17:55 system,error,critical out of memory condition was detected
jan/13/2022 11:17:55 system,error,critical router was rebooted without proper shut
down
jan/13/2022 11:17:55 system,error,critical kernel failure in previous boot
jan/13/2022 11:17:55 system,error,critical out of memory condition was detected