I think it has been discussed somewhere on here mate - though the gist was it is likely a temporary crop for this aspect of the project - or possibly cropped to focus on / examine any potential image issues for the ALI team (or for those they are uploading the images for). It is also worth noting when using any IB Tech print footage it would likely be cropped more tightly before ‘final cut’.
As it is all a WIP (Work In Progress)… many of us simply trust ALI to get this right like they’ve done pretty much everything else so far. 👍
It’s rumored there will be an IMAX release, so if that’s true, could the films be seen in complete frame format?