Is this already being looked into?
Funny, i guess it's the same reason I see randomly complain of WhatsApp web interface, on Chrome, since I switched to XFS. It says something like "no more space on disk" and logout, with more than 300GB available.
Anyway, just a stupid hint, I would try to write to XFS mailing list. There you can reach XFS maintainers of Red Hat and the usual historical developers, of course!!!