Just thought i post my sights regarding this matter, wether its a bug or intented.
This seem to happen only if you have 2 slides active and the loop setting.
Once you have 3 slides the arrow do what they should.
So, is this intended or cant the script differ between the slide position when there are only 2 slides?
Its as if it think, rgardless of first or second slide, that the current slide is the last one.