Hello @Joseph-TP , I've tried 1-6 and nothing helped. However I decided to make one more hard reset but this time I didn't upload my backup config. I reconfigured router from scratch and that worked!...

@Joseph-TP Hi! After upgrading to V1_1.2.1 on my AX12 i've experienced a speed drop down to 22 mbps on a 250 mbps broadband. This is observed only on WiFi, both 2.4g and 5g. Ethernet connection seems...