Bug with Extender EAX12 connection only in one direction

 Hey guys!

I used an EAX12 as a repeater to extend my WiFi from AX1800 (used as Access Point) using AX and SmartConnect. Works fine in the first moment, if I'm connected (with a test PC) over WLAN to the EAX12 I can ping all other devices also connected to EAX12 and also devices connected to RAX10 (either with LAN or WLAN). However, if I'm connected (with a test PC) to the RAX10 over WLAN, I can not ping the EAX12 and the devices connected to the EAX12 (this only happens, if i was first connected to the EAX12 and then walk to the RAX10 to get connected to it automatically). If i walk down to the EAX12 again everything works fine. If I'm connected (with a test PC) to the RAX10 over LAN, everything is also fine again. I can switch the RAX10 with another Access Point but then the Problem is again the same so I think something is wrong with the EAX12? Has please somebody an idea how to fix this problem?

Thanks,

Patrick