@Igor Sad news. Same glitch on the armbian image. :/
TP-Link Archer T4U AC1200 (RTL8821au) on armbian: https://pastebin.com/6erHF6wY
Odroid Module 4 (RT5572N) has horrible bad results on both images, this sample is on armbian: https://pastebin.com/Rp64npD2
This glitch is not happening on the Odroid Module 3 (RTL8188CUS) on Kernel 4.15.103.