I have a Xiaomi Mi Tv Stick and I have a huge problem with the wifi connection. There are some days where I have no problem with the internet access and there are other days in which I have to wait til the description of the wifi change from "connection with no internet" to "connection established". I really don't know what to do to fix this, so any idea would be very helpful.
Have you checked the time on your device? if you unplug the device, it may need some time to sync the right time and that messes your WIFI connection check. If that is the case, maybe change the way your clock is automatically set.