Images - Slide to change vs. pan current picture

[Thomas Pfeiffer]

Hey everyone,
there is something odd in the Images application: When I start it and swipe 
sideways over a picture, it changes to the next one - which is the expected 
behavior. But every now and then, it just pans the picture. And from that 
moment on, I cannot change the picture with that gesture anymore.
Why does that happen and can it be fixed?
Regards,
Thomas