Hi,
I recently moved to Ubuntu and I’m using .pptx files and I realise that each transition has a rapid white flash in between and it’s a bit laggy too (the transition feels sluggish), in general, transition starts then mid way you get a white flash. Please see video below
Versions of LO impress that have the issue 5.1.6.2 and I updated to 5.4.2.2 and the issue remains.
Also I’m not using OpenGL and all options in Tools → View → Graphic Output I have disabled ( by default though hardware acceleration and anti-aliasing were checked).