mcmeta for endereye displays animation frames in unpredictable order

see attached screenshot of mcmeta file:
it should load frame:
0,1,2,3,4,5,4,5,7,8
but instead:
0,1,2,3,4,5,4,5,8
the 8th frame seem to be displayed twice as long as the other although it has the same frametime and frame 7 is left out.