I have just installed LibreOffice (26.2.1.2) for the first time. I am running Windows 11 (new install, software and drivers (including graphics) all up to date), but the program runs unworkably slowly. In particular, drop down menus either don’t drop down or they are blank. It seems like a graphics issue, but I don’t have an problem with any other program; running Intel ARC 140V. I have tried removing and reinstalling and it works for a minute then stops displaying menus again (there may be other symptoms, but this is the most obvious).
Click Tools - Options - LibreOffice - View and tick the box Force Skia software rendering of it isn’t already ticked. If it is ticked then leave it ticked.