I frequelty use this option so people who are near the computer I'm remoting into can't see what I'm doing. But I've recently found out that even with this option checked, the screen is not blacked out at all, and everything I'm doing can be seen. This happens when I remote to and from both computer I'm use for Teamviewer (both Windows 10).Today I just checked again by remoting in from my android to my PC and checked the show black screen option. It blacked for a few seconds and as soon as I started to move my mouse the screen became totally visible and nothing was blacked out. Despite the show black screen option still being chcked off.
Both machines are on 13.0.6447.
Please let me know if there is a fix for this bug. I have done a reinstall of TV on both machines and it has not resolved the issue.