This seems related to the fact that you use still images; does it happen if you use only video and audio, but not stills? If not, then it's https://bugzilla.gnome.org/show_bug.cgi?id=632418
This seems related to the fact that you use still images; does it happen if you use only video and audio, but not stills? If not, then it's https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 632418