[FS#3842] 802.11ac modulation out of place based on my 802.11n wireless mode (Attachment added)

[OpenWrt Bugs]

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User who did this - CyberHead (CyberHead) 

Attached to Project - OpenWrt/LEDE Project
Summary - 802.11ac modulation out of place based on my 802.11n wireless mode
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - I have problems that disconnect clients, I use the 802.11n wireless mode and I have clients in which the ap puts VHT, losing communication without disconnecting, until the ap disconnects them due to inactivity.
My configuration, firmware and equipment data:
   - Device problem occurs on my four APs, they use firmware snapshots and 21.02 rc-1 
   - Devices model: TP-Link EAP225-Outdoor v1
   - Wireless mode "N"
   - Channel width 20mhz
   - wlan0 5GHz radio

One or more files have been attached.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3842

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