Hello  @emos 

For network unstable issue, you could try some suggestions here: 

• Try a different Wi-Fi channel on the router

Scan nearby wireless channels using  inSSIDer/WiFi Analyzer app and select a less-crowded Wi-Fi channel and change wifi channel on the router.

• Try the chipset driver and see if that helps with performance: 

Realtek Chipset Driver for Archer T3U (Plus)

• Disable other wireless adapters on PC/ Laptop when use tp-link adapter