Volume controls disappearing behind slides
I just finished (or so I thought) producing a set of courses using Studio 360. The customer has been going through them with a fine tooth comb, and noticed that the volume control in the player is disappearing behind the slides--but only on some of the slides. There is no apparent rhyme or reason; some of the slides have no audio, some have videos, some have animations, and others have audio but nothing else.
In the attached, he says, the volume controls disappear on slides 1, 5, 6, 8, 17 and 19.
Has anyone ever seen anything like this before? Any ideas?