:: @pablonietomontoya do you have a condition on the transition from Jump to Idle? If Loop Time is unchecked, your animation states could be cycling between Idle and Jump, causing it to loop.
You can troubleshoot this issue by opening an Animator window and jumping to see how the animation states transition. This will give you an idea of what to look at.
Alternatively, you can share your project over Google Drive and we’ll help you have a look.
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