@AutocareNo9 It is indeed strange, normally the entry should not take effect after disable, have you solved this problem now please? If you don't mind, provide the screenshots of the relevant...

@Lloyd_Forger Check this:

@PeterBA This has another name on tplink devices, called Tagged. As far as I know, this switch can be set up with a Tagged VLAN.

@mcntwrk1984 2.4G signal network environment is very crowded, interference is relatively large, it is recommended to conduct network environment test, choose the channel with less interference,...

@jonas740 I'm afraid it is impossible, the firmware versions of this router are not universal to the different hardware versions V1 and V2.

@Eastpark Is there the IP confilct in yout network? Suggest disconnect the switch to the router, only connect a PC to the switch, set a 192.168.0.X IP address on this PC, and try to ping 192.168.0.1,...