After many years I updated from 8 to 15 version. I have avoided the update just for don't have surprises like this.
Then I updated the TeamViewer in the servers of some clients. Our clients not always like the instalation of software from third parts.
But it is Worse, with many browsers opening with Teamviewer marketing. It will open until the server is down without memory. It's almost as bad as a virus.
We need a solution or stop using Teamviewer after many years thrusting on it.