@Solla-topee Hello Thank you for your advice! I have installed the driver you shared and the disconnection issue disappeared (tested for 30 minutes, so far so good). I think TPLINK should share this...

@Mauritz I got the same problem, I am in Japan, and using it for 3 years. When I download something with high speed such as 21m/s, it will disconnect randomly, totally randomly... I have no idea how...