wrong transform properties after FCPX XML import in Resolve

Hey Guys,

Not really a FCPX issue per se, but the solution might be on FCPX's side so that's why I am posting this here.

After importing an XML from FCPX 10.3 into Resolve 12.5, I have this problem where about 50% of the clips have their PTZR/transform parameters not translating properly.

I had to postpone my delivery because of it and it is a real PITA.

I analyzed every clip of my music video to check when it happens and when it doesn't. I was not able to see any pattern. It can happen on any type clip (regular, compound, multicam), on any parameter (but mostly position), on clips that were originally part of a secondary storyline or not, ...

Even more surprising : sometimes in Resolve there are keyframes appearing even though nothing has been changed at all on the clip in FCPX !!!!

Another weird thing: sometimes for a clip, the framing is respected but the position values in Resolve seem to be about half (but not exactly) of the values in FCPX. At first I thought that is because the my timeline is of a different resolution in FCPX & Resolve, but no they are the same. And the clips are matching it too. Then I thought maybe it's because they are zoomed but I have it on clips that have been zoomed, and also on clips with no zoom.

Additional info:
In FCPX, all of my spatial conform is set to the default: fit.
In Resolve's inspector too : Retime and Scaling > Scaling > Fit (default)

As workarounds I thought of the following but none seems ideal ...

Workaround 1 : having the whole project exported clip by clip from FCPX to bake in all transformations. But since 80% of the transitions are cross dissolve, this is not going to work easily. And in that case, is there any way to batch export all clips individually with handles ?

Workaround 2: I select all clips in my Resolve timeline and then turn off the transformations in the inspector to grade the original clips. Problem : then we will need to replace each and every clip in FCPX with the graded ones (which after being exported from Resolve will have a different length than the originals used to make the edit). Can you do that more efficiently than replacing each clip one by one manually and preserve the transform keyframe animations?

Really need of some help here if anyone has an idea ...

Thanks

If I´m getting it right, it works like that:

On XML-Import in Resolve uncheck "Use sizing information"
Grade in Resolve
Deliver using the FCPX Preset and "single clips" which will create an FCPXML
Import the resulting XML in FCPX

In the resulting project all your transformations should still be there applied to the graded clips.
Only Audio normally gets totally messed up but that´s easy to use from the original project.

Depending on how likely it is that there are still changes in the edit or the audio I would normally:

Copy the ungraded project as Snapshot
Detach audio
Copy the graded project in a secondary storyline (in complex projects on top of the original storylines)
Check all transitions and titles (and if in doubt transformations)
Delete or disable the ungraded clips.

If there is a lot of change to come I wouldn´t detach audio and just disable the ungraded video...

P.S:
I´m using the word "project" as it is used in FCPX.
Won´t comment on that further to spare me another shitstorm