XCF from GIMP 2.8 with fonts with later pixel edits applied exports incorrectly
An old XCF file which I still created and imported from GIMP 2.8, which has font layers that were edited with pixel effects (colorize and others), exports quite incorrectly for me.
How the image looks like in GIMP (this was created with Edit > Copy Visible): https://www.jtwrites.net/temp/image-correct.jpg
How the image looks like exported: https://www.jtwrites.net/temp/image-wrong.jpg
It seems some of those font layers revert to the original font, but with a completely wrong position & font. If I click those layers in GIMP and confirm the text editing in "Confirm Text Editing", the effects are lost (obviously) but the position & font choice is correct, so the information seems to be still correctly in the file in some way.
Since going the path through edit > copy visible and then exporting that is a bit of a nuisance, it would be nice if this could be looked at. As for the XCF file, I wouldn't want it publicly archived on a public bug tracker, but I can e-mail it if you want to take a look at it. Sadly, I don't have a minimal XCF file to produce this problem right now.