Why can access to the network be lost before the ping command from the provider?

Question

Mikrotik

Good afternoon!
Maybe someone will tell or have suggestions.
1. There is a MikroTik rb951g-2hnd router from my side.
2. There is a provider.
MikroTik is configured from the provider via DHCP on the WAN, and also raised the Bridge for the local area network at home.
Problem The
router receives an IP from the provider and sees the provider's local network (/ip neighbor print, 20 devices), but the traffic does not go, ping gives host unreachable to ip 8.8.8.8 and others, the Internet does not work.
I call tech support, they do a PING to me and everything works miraculously.
But after rebooting the router, everything repeats.
The provider offers to change the router to their model (Asus), I don’t want to do this.
What could be causing this behavior of MikroTik?
Thank you.

Answer 1

proxy arp on interface?

Answer 2

This can be, for example, a "relatively honest" way to sell you an unnecessary router :) Ping to their managed switch (or wherever it goes there) launches a certain trigger that registers something somewhere - for example, the router's poppy in the arp table - and that's it works. Until reboot.

Answer 3

wireshark should be set on the interface towards the provider at the time of problems. Everything will be clear.