I'm having a similar problem to this with the iPad version, even on 1.9. My preset for the document is the size of my laser bed, dpi is 96 as that is what both my Glowforge interface expects as well as Lightburn. When I create a 2” square and export using Document Properties when I open in Lightburn it’s always way bigger. If I export and manually set the dpi to 96 it appears to work, at least for Lightburn. So it’s ignoring the document dpi when exporting. No matter how I set dpi it will not come 8nto the iOS version of Adobe Illustrator at the correct size. Even turning off preview doesn’t help there.
How do I set the default dpi to 96 on the iPad version from 300 to 96? IT would make life simpler if it don’t have to change it every single export.