pdf fade transitions flicker in full screen playback

I have many pdfs with multiple pages set to slow fade transitions between pages.  When I play them full screen in either Acrobat or Reader the transitions now flicker noticeably rather than appearing smooth.  This has only begun happening recently but I cannot pin it down to a specific software upgrade.  I am running Mac OS 10.10.5 on various machines and the behaviour is identical on all of them.

Any suggestions?