System keeps asking for Wi-Fi password, although I have checked the "Store password for all users (not encrypted". I do not have to manually insert password I can just connect through tray icon and then I do not have to enter a password but the connection constantly breaks every ~3-10 minutes and system ask for a password.
EDIT
After running dmesg It turned out that my system was disconnecting from Wi-Fi because router is using both 2,4 and 5 GHz frequency and switching from one to another (based on MAC address). I had to check one in settings and that solved the issue.