@Barutchiev A similar issue but with a different device was described here. Make sure your HomeCare feature is disabled (I believe this shuld be done via Tether app). Make sure that Device Isolation...

@Seed86 If your AX58 DHCP server is set to Auto then turn it off and test if there's an improvement. That's a known behaviour - read through this article for more details.

@Very_Confused It should be possible to extend your network by connecting an RE315 to PA9020P via cable and RE315 is configred in AP mode.

@ayman85 It seems that you're on the latest FW release so far - there's no newer version.

@stefanovezzosi RE605X supports Easymesh from HW v3 and above - Easymesh is not supported on HW v2 according to this list. Your best bet is to obtain HW v3 RE for your setup.

@Kari_Lindh Set the RE305 in AP mode and connect via cable to your swich - details. Make sure that its DHCP server is turned off. Set RE305 SSIDs as you like.