@Solla-topee 

Hi, thank you for answering.

"But it happened none helped, then I changed to network router and that helped"-- What do you mean? :
Sorry i meant RESTARTED ... so:
"But it happened none helped, then I restarted network router and that helped"

Router is 2 meters away from computer. All other devices are working totally fine while this is happening. It happens randomly, after 7-10 days, i turn back on my computer from sleep mode and then it starts happening.

I haven't done anything to trigger this phenomenon, it just happening randomly. I'm not touching the wifi router.

One very important thing that i forgot to add: i had a t2uh adapter before, and it was doing this exact same thing on 5Ghz.

The router type is: ZyXEL P8702N

Greg

@g_seni 

Here is a video, it is happening now, device manager is constantly refreshing, adapter is being turned off and on:
https://we.tl/t-6Cewxf9y2Y

I'm having similar problems like @g_seni with my recently purchased T9uh v2. This is how I recreate the issue:

1. Lock my laptop for a few minutes which puts it to sleep. The blue led on the adapter turns off.

2. Unlock my laptop. Blue led on adapter turns on.

3. After waking up, at times ( maybe once out of three times ) the adapter fails to connect to the 5 gHz network. Ping to my router. 192.168.1.1 reports a 100% packet loss.My builtin laptop adapter works fine.

4. I then change the USB port of the adapter ( take it out of the cradle and connect it directly to a different USB port ) - it works properly. But it's only a temporary fix, the problem comes back after the laptop goes to sleep.

I've tried the 20191129 driver from the previous post but that fails to fix the issue. Any help ?