I got a new screen a while back with 1440p resolution, and ever since things get f-ucky when I drag the Plex Player between my new monitor and my old TV screen with lower resolution.
Things get misaligned, the upper “control bar” (with search and full screen controls) disappear, sometimes it comes back when I resize the window, sometimes not, and sometimes the whole content of the player appears smaller (doesn´t cover the whole application window).
Plex really needs a proper bug report system. And proper customer support.