Mogrt in 4x5 (1080x1350) turns out square in Premiere?!

Hi!

I'm trying to put together an mogrt in AE in 4x5 (1080x1350 pixels), but when used in an Premiere project it appears square!

Any tips?

The Premiere project can be 4x5 (1080x1350) or an standard HD 1920x1080 - same thing happens.

If i make the comp thats used in the mogrt 4x5 (but in 864x1080) it appears in 4x5 in an 4x5 (1080x1350) project in Premiere but smaller offcourse since it's smaller then the timeline.