Well, thank you very much for all of you for your kind efforts.
Everything is pretty find with my board and another board but not everything looks to be fine with my "main controller board".
Also, why some of the boards RS485 work and not my board. Well, i have used 4069 IC for hex inverted and the working "RS485 Aliexpress" board uses 74HC04 and that's the only difference i was able to determine.
Also, i got several different RS485-TTL boards from amazon, from different manufacturers and same thing happened.
I have no idea in depth what could be the difference when CMOS Schmitt Trigger on 74HC04 is used vs this one but that's how it is.
I would love to know if it is safe, i would switch the hex on my board and use it like that.