[Phil Davies]

Ok so the clips play fine in QuickTime.

If I remove the titles it does improve the flickering in that area but there is still flickering elsewhere on the timeline where there are no titles. The tiles are FCPX presets and not a third party plugin.

I need to do more tests but it seems like creating a new project and adding in the footage without any titles or other overlays works ok. As soon as I add anything above the primary timeline it triggers the issue, which remains in places even if I then remove all those overlays.