I'm having issues with Gigabyte Z390 Aorus Master, which uses Intel® Wireless-AC 9560. Sometimes 5 GHz WiFi doesn't work. When I look for available networks, if wifi is in 2.4 GHz everything is working fine. When it switches to 5 GHz then sometimes no network appear and Event Viewer in Win 10 is full of errors Intel(R) Wireless-AC 9560, code 5002, 5003, 5005, netwtw06. It usually happens after playing some games. Rebooting or reverting/updating drivers don't change anything.
I updated BIOS from F8b to F8e and I thought it fixed issue. Everything was working fine until today. I booted PC and again troubles after ~2 hours. I just reset bios using button on back panel and it worked fine for few days until now. Today this issue started again when playing game, I experienced lags and then connection lost completly. I flashed bios to F7 and it didn't help. After few reboots, reverting/updating drivers it started working again, but problem will probably appear again in future.
Windows 10 - 1809