Hello, I solved my "3-minutes disconnection" problem with my Asus T300 CHI (Windows 10 installed).
At first I was thinking the problem was related to the power to the MDA. I tried to power my MDA by the usb 3.0 of my tv (Hisense 43M3000) and also by an usb charger 5V-2.4A... the MDA was powering on with no problem.
At the end I found that the disconnection problem was related to an old network card driver. The network card is an Intel dual band N-7265. I tried to install the drivers using the Asus driver support, than using Windows updates but the solution was at the source: Intel website. After upgrading to 19.20.0.6 driver version (last month update) the disconnection problem disappeared. Now the MDA works like a charm for hours without disconnecting.
I hope this help.