What happened?

Hi,
I have an RB3011 and in the last 2 week it blocked twice.
The funny thing is the first time it doesn’t work after reset. After I spent few hours on google i make it work (I reconfigure the bridge and dhcp server)
Today the router blocked again. i reconfigure the bridge and dhcp server again but without any success . I dont have any idea of what i have to do to make it works.

When the router is blocked i cannot connect remotely through winbox and the the hdcp server don’t serve the ip to the machines . Afer i reset the remote connection works but not the dhcp server.
Any ideas?
Thank you

are you using any firewalls and address lists to block traffic.

I figure out about the issue. (I put the hdcp server on a wrong interface).
But the mistery still exist. Why the router bloc from nothing and loose/mix/(i dont know) the configuration?