Hi @M3rhy 

In this thread I was told that this is a known limitation of the current TP-Link implementation of EasyMesh. Guest Networks are not meshed.

As You can see in the above thread you should check that you guest network is actually isolated from your normal LAN devices - in my case all devices on my LAN can be accessed from the so-called "isolated Guest clients", but my AX55 WiFi routers are all operating as Access Points. If you are operating in normal mode where your AX23 is directly connected to your Internet Service Provider - things might look different.

Regards

zEnterHacker