Fade-Transition not working properly

Hi,

When creating a cptx-project containing cpvc-slides, some slide-transitions dont work properly. This concerns every transition from a cptx-file to a cpvc-file (the other way works fine). The result is that the fade-transitions get interrupted, the loading-item (see picture below) appears quickly and afterwards the transition ends an the cpvc-video continues. This means that I dont have a nice transition between a slide without video to a slide with a video. Does anybody have the same issue or knows how to fix it?

Thank you for your help.

Best regards,

Adrian