Small pause after a loop in Mecanim

Hello,

I have a problem playing a clean/fluid animation loop with Mecanim. It seems to make a small pause (first I thought it was repeating a keyframe) after every cycle of a loop animation.I have searched for similar problems and ensured that I'm not in one of those cases (as far as I know, maybe I'm understanding something in a wrong way), before posting because my problem looked like previous posts or Unity answers.

Some information:
-The animation has 38 frames.
-Frame 1 and Frame 38 are the same to ensure a good loop.
-When importing into Unity I'm doing this through a fbx file (exported from blender).
-When importing I'm taking care of the first and last keyframe being the same, so in the end range I Import one frame less, to avoid a duplication of the same key frame.
-Loop Pose is checked.
-The loop also makes the small pause in the preview window, so state transitions are discarded here. The small pause It's perfectly perceivable when setting the play time to a lower value (0.25 for example).

Things I tried:
-Import also the last frame (same as first one), just in case Unity is treating this as a especial case to perform loops.
-Create also a keyframe for one previous frame to the last one imported to make sure that the last imported frame is also a keyframe.
-Even removing more frames from the import (and breaking the clean loop on purpose) stills makes the small pause at the end.

I don't know what could be causing this. I'm completely lost, I don't know If I'm doing something completely wrong or there exist a problem interpolating the last animation frames.

Any suggestions?

Thanks in advance for your answer.

 

Solved.

The problems was in the animation. Sorry.