I want to report bug on 1.15.4 and recent versions of PMS.
When I connect my Lenovo Yoga 920 4k Win 10 Laptop to TV via Type C/HDMI video cable and close the lid I observe 2 issues:
the mouse pointer positions itself on the center of the screen and would not move
the picture will squeeze and show a small window in the right bottom corner.
PS. Power setting set to never go to sleep when laptop cover is closed.
There is another separate issue when media plays on Samsung TV. About twice during the movie play sound disappears and reappears for a second.
Could you test/confirm this?
It’ll help to pin down the root cause of this behavior and to identify if it’s related to the Plex Media Player or the way Windows connects with the TV screen.