html5 PREV audio bug?

While viewing any HTML5 slide (call this slide 5 for reference)... click PREV in the middle of the slide (call this audio point M) to begin with slide 4.

When the slide transitions to slide 5 once again, the audio begins playing where the slide left off at audio point M, but the video begins at the beginning.

Interesting thing is there is no way to reset this.  Let the slide complete, play other slides, whatever, slide 5 will always begin the audio at audio point M where the PREV button was pressed.

Known bug?  Workaround?

PS:  All testing done on iPad 4 with latest IOS.