I encountered a bug when using image gallery with an animated left sidebar. When swipping the images from right to left, the image will move to the left, but at the same time, the animated sidebar will open.
Another scenario is when the left sidebar is open. When closing/hiding the left sidebar, the image will move to the right (next image will show).
That's not really a bug, just an unintended interaction.
You can change the animated sidebar to not open/close on swipe. There is a property for that.
Or, you can go into the image gallery event handling code and put in an event.stopPropagation() call to stop the event from bubbling out to the sidebars.
Hope this helps,