jerky movement in swiping scroll view in demo project

[drmarkpowell]

When slowly swiping between multiple photos in the demo project, the scrolling view movement is:

• sometimes not smooth, especially when slowly, lightly swiping left or right
• sometimes stops between adjacent images at the end of the swipe animation

behavior was observed running under XCode 9.0.1, swift 4, iPhone 7.

[drmarkpowell]

Screen capture video file
MediaBrowserJerky.zip

[drmarkpowell]

I'm not 100% sure why, but this issue may point to an important clue:
mwaterfall/MWPhotoBrowser#620

When I returned "nil" for my caption view for my Media, the problem went away. Looking at the fix for this issue that is noted on the issue link above may reveal the way to a fix.