Well I have got the same problem…
In FCP my timeline s set to prores 422 1920*1080 25fps square pixel and interlacing off.
In AE my composition is set to hdtv 1920×1080,25fps, square pixel. I render with field render off and with Animation codec.
When I import animation quicktime movie in FCP, FCP interprets it as interlaced footage with upper field…
I can’t understantd why. It’s like that for AE HDTV 1080 25 is always interlaced…
The problem does not appear if my AE composition is set to 1050×576.
Can anyone explain this please?
thanks