FBX export problem

Hello!

I’m having an issue with FBX export from a joint animation.  Here is the c4d file.
https://www.dropbox.com/s/nqw13vou9ecqme2/DebugFBX.c4d?dl=0

You can see that the original file has an animation on the joints that works well.  The FBX version goes a bit crazy towards the end, as if the scale was going in the wrong direction…This came from a regular export to FBX, here are the settings
https://www.dropbox.com/s/gmtvdc1xitygb6x/2019-03-31_17h55_14.png?dl=0

What could be causing this?

Thanks!