We have a MikroTik router at a colo, running RouterOS 5.9. One Ethernet interface connects to the Internet, another to an MPLS cloud which connects to our other three sites. This router was fine up until last week, when the provider migrated us and other customers to a new router on their side. There was a day-long outage while they figured out what they did wrong, then everything came up fine--but now our router needs rebooting every 24 hours or so. It always responds to pings from outside, but does not pass traffic from one side to the other for more than about 24 hours. Power-cycling it always fixes the problem--for a day.
I'm putting this in the Beginner Basics forum because my background is mostly Cisco, never played with these boxes before.