Strange problem with rb2011uas-rm

Dear in the last few days is going weird problem with rb2011uas-rm - RouterOS v5.25. After a few hours can not be accessed either via the LAN or over the WWW, telnet, ssh until it no problem pinging. After a reboot (power off) everything is back to normal …
Reset it to factory settings … and has only three interfaces, pppoe-client and two LAN
And sometimes pppoe-client works as pinging an external address but he simply can not access until you reboot…

Excuse my english writing is not the best

Greetings!

Upgrade first bootloader and make downgrade to 5.24.

thank you
Upgraded the bootloader and installed 5.24.

It remains to wait, and test to see how we work …

:frowning: :blush: Again the same problem… :frowning:

Does someone have any idea ???

Make an export using:
/exportafter that make reset of configuration without defaults.
Finally make import parts of line by line.