AppImage Portable Mode

This question is about appimage-run. I can’t get it to recognize the .config and .home folders in the same directory of the appimage file.

some folder has the following files and folders:

some-app.AppImage.config
some-app.AppImage.home
some-app.AppImage

Expected:

running some-app.AppImage with appimage-run should use some-app.AppImage.config and some-app.AppImage.home as .config and .home folders, as per portable mode described here: Using portable mode — AppImage documentation

The workaround I have to currently use:

setting XDG_CONFIG_HOME and HOME manually.

What I would like:

for appimage-run to handle this automatically and detecting the presence of the relevant portable mode folders.

Is there a developer that I can forward this request to?