Not having any luck importing OpenTL archives

I’ve tried to open OpenTL archives from 2 different sources but Nuendo just adds empty tracks with no events on them. I did select all for what to import.

Is there some special trick, or is OpenTL import buggy?

EDIT: I just checked exporting OpenTL from Nuendo and then re-importing it. Only a few of the events survived the round trip. It seems OpenTL support in Nuendo is just really flaky.