Xiaomi Mi Router 3 Pro - LAN Destination Host Unreachable

Hello everyone. I have recently changed my operator's router for a Xiaomi Mi Router 3 Pro with OpenWrt 19.07.2 r10947-65030d81f3. Everything works properly until visibility between network devices is suddenly lost and you can't even ping between them. The response to ping is Destination Host Unreachable and is resolved by restarting the lan interface. If I ping from the router it does reach the device. I have tried restarting the firewall but only restarting the lan interface works. I can't find anything in the system log. Any ideas? I have the same version of openwrt on a Xiamoi 3g that is configured as an access point and in that I have no problems.

There has been reports about this here https://forum.openwrt.org/t/ethernet-port-of-xiaomi-r3p-pro-is-unstable/70924

Did you ever find a solution?