@Silentlooker You'll have to wait for Kevin_Z or someone else from TP-Link support to reply. I doubt you can do anything on your end if it's bug in the firmware. Thanks for reporting the issue...

@coxon-1990 Hi! Have you tried restarting the router? If yes and it didn't help, how about factory resetting the router?

@Fudodudo Have you tried to factory reset the router? If you did and didn't help, I'd return it if it's still covered under warranty.

@Silentlooker In that case, I think it could be the bug in router's firmware. Maybe @Kevin_Z can provide you a beta version of the firmware so you can test then.

@Fudodudo Does this happen on all connected devices or just some? If so, have you tried to factory reset the router?

@Silentlooker Have you tried restarting the router? Encountered Operation failed few times on my AX20 when visiting System Log. Simple reboot fixes the issue.