I bougth a AX53 this week and the WPA3 only mode works perfect. But there is a small problem, while setting up the guest network I realized it only supports the WPA2/WPA3 dualmode, it is not possible to set it to WPA3 only. On the default WiFi and on the WiFi for IOT devices it is possible to select WPA 3 only or th WPA2/WPA3 mode. 

But guest mode seems to be limited to only to the mixed mode, is that a bug in the firmware? 

WPA2/WPA3 dual mode makes sense for most guests, but isnt it a security risk to still use WPA2 compared to WPA3?