Hello, i bought Xiaomi mi wifi 4 router, installed it with same settings from previous router mi wifi 3. Setting up was OK but new router keeps disconnecting from internet both wifi and LAN keeps disconnecting from internet each 30 seconds etc. Internet is working normally but after some time (30-60 seconds) it disconnects and then automaticaly connects back and than aggain working 30-60 sec, then disconnect and aggain and aggain. This is happening in cycles. Router FW is 2.26.145. I tryed change all settings, QOS, firewall, etc. change all regions and even factory resset. Nothing helped. Can it be HW problem? Or should I try downgrade firmware? If yes HOW? Please help me. Thank you.