its possible that one component specifically, might be causing this, you'd have to play around with the widths to fix for now as its not a quick fix on our end, unfortunately.
hmm yeah I do see that - likely related to a component that is not set to fill - make sure your artboard is set to 1440 fixed and then find the section that is not fill (most likely fixed) and all should be fine, quickest workaround for now apologies for the issues.