I've seen this with four computers today so I assume either the latest TeamViewer has an issue or the latest Windows 10 / Server 2016 makes it less compatible.
Basically, once updated to TeamViewer v13.2.5287, Windows 10 and Server 2016 will then ask for UAC permission to run TeamViewer.
Rebooting the computer means losing connection permanently as TeamViewer then won't start with Windows like it should.