To clarify. Whenever I use an animation that does not have looping and that animation has played through, all the other looping animations only play the 1st frame of their animation. I have tried to add a play current animation which only seems to repeatedly restart the animation playing to the 1st frame as well, thus creating the exact same problem.
The only real solution would indeed be to either have 2 animations for jumping. One that changes to the other one at a certain frame, and one with only 1 frame that loops.
Or as you said to have loads of identical frames after each other.
However, Ashley said the animation system is getting a fix soon so I guess I'll make an auxillary solution and then fix it when I can:)