Random reboot 8 Plus 11.2

Hello,

Tonight i noticed that my 8 Plus rebooted itself while it was idle and charging. When i unlocked it, i noticed that asked me for the passcode due to the reboot.

Anyway, i looked through the Diagnostic logs and i saw a "SystemMemoryReset", probably the root cause of the reboot. Looking for details, i saw the eventReason:

"User reclamable memory dropped below the limit. User reclaimable current: 63%. User reclaimable minimum: 65%"

Anyone knows something about this "SystemMemoryReset" or similar logs?

Cheers