I have the latest version of LibreOffice Impress. When I start the presentation mode (F5) I only get a white background with a little hourglass in the corner of the screen. If I press a key to move forward in the slides, it does nothing, and I need to use ESC to get back to the edition mode.
See below for version of LibreOffice and OS:
Version: 6.0.1.1 (x64)
Build ID: 60bfb1526849283ce2491346ed2aa51c465abfe6
CPU threads: 8; OS: Windows 10.0; UI render: default;
Thanks.