Livebox 2.1 rebooting from time to time and eth ports dead

Hello, sorry for bad english

My router: Orange Livebox 2.1 Lantiq xrx200 ARV7519rw22 ALT
LEDE Reboot 17.01.0 r3205-59508e3

From time to time it reboots....

Also, other problem is sometimes ports 1 and 2 of ethernet switch stop working at all. As if they were "dead". Not even network restart command fixes. Only hard rebooting makes them work again.

Any idea?

Thank you.