Dear TP-Link Support Team,

i have four Archer AX55 V1 routers, one acting as my main router and the other three as satellite. All routers are in AP mode.
I use ethernet backhaul.

I’ve noticed that every time I make changes to the Wi-Fi settings such as switching the channel the router automatically changes the bandwidth to 160 MHz, even though I had manually set it to 20 MHz.

This behavior persists after restarting the router and even when the mesh feature is enabled. I’ve checked the latest firmware release notes, but didn’t find any mention of this issue being addressed.

The only way to restore the correct bandwidth setting is by applying a previously saved backup. Without doing so, the router keeps reverting to 160 MHz, regardless of my manual configuration.

Could you please advise if this is expected behavior, a known issue, or if there’s a workaround to ensure the bandwidth setting remains fixed at 20 MHz?

Thank you in advance for your support.