This might be relevant:
"The plug-in converts video clip speed changes (slow, fast,
reverse playback) to the Avid Media Composer Motion Effect,
which is the only supported effect."
If you aren't conforming in Avid, here's a time-consuming workaround:
Export all of the timewarp / time remap clips from Premiere to
lossless digital intermediate (DI) files, then use them to replace
the original clips in a duplicate Timeline before exporting your AAF.
Lagarith Lossless Video Codec (pc only)
Ut Video Codec Suite (pc or mac)
Virtually lossless codec:
Avid Codecs 2.3.7 - DNxHD (pc or mac)
Your selected lossless codec will need to be installed on both systems.
It looks like Premiere AAF export doesn't support The time remapping, unfortunately the editor used it in all the cuts.
XML export is not supporting the Time Remapping either. This is quite a frustrating turn of events.
Unfortunately, this is a problem for our facility. We do all of our Conform and Color in Autodesk products.
Thanks... for the link. I submitted a wish.