heh. looks like 8.3.6 fixed it, but doesn't seem to be explcitly called out in the release notes.
regarding file system - I'm more curious why some paths (like /data/projects) aren't in the image. I feel like I may have answered that question myself at some point when poking around in docker-entrypoint.sh, but maybe_seed_data_volume() doesn't seem to be the culprit after another quick look
(I can't mount two named volumes separately to data/config and data/projects)
also FYI the 8.3 "Warning" blurb has changed since 8.3 - it now points to the 8.1 upgrade guide
8.3:
WARNING: If you are upgrading to Ignition 8.3, you must read the upgrade guide first before installing Ignition 8.3. Visit the following URL for more information before installing: Ignition 8.1 to 8.3 Upgrade Guide
8.4+:
WARNING: If you are upgrading to Ignition 8 from any previous version of Ignition you must read the upgrade guide first before installing Ignition 8. Visit the following URL for more information before installing: Ignition 8 Upgrade Guide