Oxygen Editor 25 webhelp broken

[michaelmcl]

I've just upgraded to Oxygen Editor 25 on MacOs Monterey. When I try to run webhelp responsive transforms, the webhelp builds but places all the html files in a folder named after the parent folder of the ditamap (Railway-UserManual in the screenshot below) - causing path issues. It never did this in v24.1 - all HTML files were at the top level of the output folder.
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Screenshot 2022-11-04 at 15.04.02.png

Consequently, all menu/tile links are broken and although search works, the pages that are returned cannot access their css files and so are unstyled.
Am I doing something wrong? Any help appreciated.

[michaelmcl]

SOLVED
I've solved the problem - The issue was caused by linking to a warehouse file that lives outside the ditamap folder. This seems to cause the webhelp behavior described above.