When you've got a gallery that has only 2 images, you cannot endlessly swipe to the right (or left).
When you've got more than 2 images, this can be done.
For instance, when you've got 3 images:
You enlarge the first one and then you can swipe tot #2, then to #3, then to #1 and so on.
When you've got only 2 images:
You can enlarge the first one and then swipe to #2, but when you swipe again to the right, it stucks.
And the only way to see #1 again is to swipe in the other direction (to the left in this example).
But, as I said: only little buggie
