Problem exporting jpeg/stills from Premiere (image squashed/stretched).

Hello,

I'm having trouble exporting jpgs or any stills from premiere pro cc 2020. I've updated to the newest version and changed to several different sequence settings to no avail.

The image is exported squashed to a different ratio (see photo above).

These are my sequence settings:

It looks fine with-in the project but is squashed when export to my mac.

Any ideas on how to fix this?

I can find any separate output settings for exporting still images.

Working on a tight deadline so any help would be very appreciated. 

Cheers 

Jordan