In MantisBT #0559, Georgy took an in-depth look at how Dissolve works when the two affected clips have an alpha channel at different opacity (see comment 005645, for a detailed description). The purpose is to eliminate The flash of gray lettering just before having the normal Dissolve. Georgy explained the problem well. A patch appeared in CinHV to fix the problem but Georgy saw no difference between CinGG and CinHV with the same project (provided by IgorBeg). Investigating further he saw that the normal operation of Dissolve leads to the very flash we considered a bug. So the question is whether to leave it as is or make interventions to have a different result, more in line with expectations. Do you have any ideas/proposals on how Dissolve/Fade should work? https://www.cinelerra-gg.org/bugtracker/view.php?id=559