Ubiquiti Router disconnecting Internet when pinging too many game servers at once

I have an Ubiquiti Cloud Gateway Max router with built in UniFi controller. When I start the game Rust, it starts pinging the servers used by the game to get the state. Steam settings are 5000 pings per minute (allegedly). My issue is that the router seems to completely disconnect from WAN and starts sending Internet disconnected alerts in the UniFi console the moment the game is launched and the pings start. The disconnection lasts 1-4 minutes. I checked the NAT table of the router and it is not fully utilized (2k out of 13k). Same goes with CPU usage of the router, 50% max on all cores right

Question by Baterka on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.