Thank you kindly for this reply and for relaying your workarounds on the issue.
the animation system has been overhauled and is not directly compatible
Is this documented somewhere? I'm curious to read about it.
In my opinion, this is a serious drawback and borderline dishonest of Reallusion to market IC8 as having backwards compatibility with IC7.
Especially when IC8's core animation remains quite similar to that of 7.
If there was an overhaul on the keyframe system, the resulting improvements are not obvious to me, and I would welcome being corrected on this.