[FS#3791] MT7603E disconnects or at the very least has terrible latency spikes under load (Attachment added)

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - dana44 (dana44_) 

Attached to Project - OpenWrt/LEDE Project
Summary - MT7603E disconnects or at the very least has terrible latency spikes under load
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - To reproduce just do a flent test:
   //flent rrul -p all_scaled -l 60 -H netperf.bufferbloat.net -o image.png//

The only configuration changes was to set the wireless to enabled with encryption set to //mixed WPA2/WPA3 PSK, SAE (CCMP)//

Attached are images from a WSL2 instance on a windows 10 Intel 9560 laptop connected to the 2.4GHz radio (MT7603E) on a [[https://openwrt.org/toh/netgear/netgear_r6220|Linknetgear r6220]] running OpenWrt 21.02 rc1.  The laptop will disconnect before finishing.  When running on wrt3200acm or r7800 there are no connection issues like this.  Test was also done with a local 192.168.1.2 host directly wired into the r6220.

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=3791

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