Wireless issues on Endless

Looking for help with setting wi fi connection.
I have 2 wireless router TP Link at my flat which are use same network. both are working well with different devices. but 1 of the them have not stable connection with laptop with Endless OS. Every few minutes connection breaks and on WiFi icon question mark appears. At this time I still getting IP from router, internet works well on other devices.
Thanks

Something that would help us a lot to understand the problem would be this:

  1. Open the application called ‘Terminal’
  2. In this application run the command:

eos-diagnostics

  1. The above command will create a file with the information of your system (example: eos-diagnostic-160614_111731_UTC + 0100.txt); Send us this file so we can analyze and see a possible solution

issues stopped by itself

@Maksym_Gamala Where’s diagnostics?

here is it
eos-diagnostic-180812_142309_UTC 0400.txt (1,0 МБ)