I appreciate this is a minor problem for some - but for my family's sanity...

My kids play Roblox (a lot).  They can no longer access the servers following me upgrading the OC200 firmware.

It runs perfectly on 5G mobile, but not my network.  Must be a new feature or configuration change - but I just can't find it.

It doesn't work on either WiFi or Ethernet.

I have tested whitelisting by URL and keyword, port fowarding and turning off various firewall attack settings.

I've tried Cloudflare and Google DNS - but were using these prior to the upgrade.

Any advice or suggestions greatly appreciated