I think I find solution for 2,4Ghz Its working for me
/system/et/wifi/WCNSS_qcom_conf.ini
go to line:
#Channel Bonding
gChannelBondingMode5Ghz=1
gChannelBondingMode24Ghz=0 <---you need to change this to 1
My phone has seen only 54/72Mb/s link speed, after that in 2,4 ghz all works great, detect 150Mb/s from router.
This actually works for me but broke my miracast connection too... And then is a no way for me.