Mastodon thread documenting the problem: https://mastodon.world/@JamesTDG/113133633353101256 (I did end up modifying the image to not have the dark red bars)

So, for some odd reason, running the tool with brave (with all extensions and shields disabled for the site) causes this alignment issue that is too much work to fix in post. This should be looked into and be fixed.

Sounds like you did not set you ascent/descent/pixel size correctly, there’s an ruler shown when you move the mouse over your source symbols.