So, for these 2 days since posting this subj i'm already bricked my device when flashing and set all to normal.
I found that i i choose one chain to receive and second chain to send only, it fixed a problem for 30 min, ping was 1-2 and then 1000+.
it did not work for the next time
In another timei've just reset configuration , it starts to work fine with both channels and any band/channel for few hours and ping slowly rise to 50.
Later, at my second test ping is 1000+ and nothing helps at all.
Also, when it worked fine, i've that when i come to an AP, ping rise to 1000, normally device is at 20m from AP. Reconnection at current position fixes it.
Also, i found that looks like something is overflowing after 5-10ping packet and it begin to lag.
I think this is a OS/driver problem.
Or i should return it by warranty?
When it worked fine, my Overall TX CCQ was 90+, for now it 20-40