Teamviewer 12 pop-up


we are experiencing problems with teamviewer 12 popping up and taking focus out of nowhere. we have disabled pop ups in teamviewer settings.

we are running Win 10 IOT on some custom computers, with explorer replaced in regestry, so we have no clue how this can happen.
i am suspecting that the error might be related to teamviewer 12, as our images with teamviewer 10 and our images with teamviewer 13 isn't doing this. it has happened on serveral units not, i have checked if this is an error from our side, but no one has been connected to the units in over 4 months.

is this a know error and is there a way to fix this?