Compound Clips and Rendering at Source Resolution

I'm working with the free version of Resolve (in case that has something to do with the troubles I'm having).
I’m experiencing a hangup where I’m bringing in footage from FCPX that is retimed, and it is automatically creating a compound clip in Resolve. this doesn’t necessarily bother me, but the problem lies in the exporting of that compound clip. ultimately, I need to export my shots at their native resolution (so things conform correctly back in FCPX). however, when I export (and I select “Render At Source Resolution”), it sizes everything down to my timeline’s resolution of 1920x1080. rendering at source resolution DOES work on footage that isn’t a compound clip. but not when they're compounded. can anyone explain this or give me a workaround? my timeline is full of mixed resolutions and frame rates. I hope I don't have to change my master settings for each of these different formats to export them in their native resolutions.
I’m experiencing a hangup where I’m bringing in footage from FCPX that is retimed, and it is automatically creating a compound clip in Resolve. this doesn’t necessarily bother me, but the problem lies in the exporting of that compound clip. ultimately, I need to export my shots at their native resolution (so things conform correctly back in FCPX). however, when I export (and I select “Render At Source Resolution”), it sizes everything down to my timeline’s resolution of 1920x1080. rendering at source resolution DOES work on footage that isn’t a compound clip. but not when they're compounded. can anyone explain this or give me a workaround? my timeline is full of mixed resolutions and frame rates. I hope I don't have to change my master settings for each of these different formats to export them in their native resolutions.