Ethernet (cable) losses connection with WT Launcher

Hi!, my problem is that everytime that I try to download the game, the connection to the internet is lost.
This only happens with "some launchers (like Wargaming and WT), meanwhile STEAM, GOG, EPIC, XBOX APP, go with the infamous “work fine”.
If anyone can help me trying to find the cause (not to mention a solution) please. =(
I’m adding the screenshots showing that WT launcher turns the internet “off” and for example, XBOX APP, not. O.O