Mode 2.4 GHz does not deliver appropriate speeds and there are many packet losses (GL-INET MT6000)

Describe the bug

When connecting to the 2.4 GHz network, there is a considerable loss in speed in Xiaomi and Samsung brands smartphones. This problem does not happen on the PC with an Intel Ax210 network card

OpenWrt version

r25142-a42075435a

OpenWrt release

SNAPSHOT

OpenWrt target/subtarget

mediatek/filogic

Device

GL.iNet GL-MT6000

Image kind

Official downloaded image

Steps to reproduce

Connect any smartphone at a frequency of 2.4 GHz

Actual behaviour

There is a considerable loss of packages in 2.4 GHz, making the speed limited to 60 Mbps

Expected behaviour

There should be no problems with loss of packages

Additional info

Test in smartphone: https://postimg.cc/qzZgG61b
Test in pc with AX210: https://postimg.cc/f3rRcVD7

Developers believe it is a problem with the MT76 driver. Therefore, they launched a version of the proprietary firmware with the mediatek drivers in a closed source that partially solved the problem. However, he uses an old OpenWrt version without support (21.02): https://dl.gl-inet.com/?model=mt6000&type=beta

Diffconfig

No response

Terms

• I am reporting an issue for OpenWrt, not an unsupported fork.

No source file, test, or entry point is identified. Start by reproducing the 2.4 GHz packet loss on the GL-MT6000 with OpenWrt SNAPSHOT r25142-a42075435, then compare the MT76 driver behavior with the proprietary MediaTek firmware and isolate a reproducible driver change; done means the smartphone connection no longer shows the reported loss and speed limitation.