ostree.sizes metadata issues?

[Alexander Larsson <alexl redhat com>]

I notices that the endless ostree.sizes metadata support landed, and
I'm interested in using these to improve the flatpak download size
estimations.

However, I seem to remember that there was some kind of issue with
these the last time they were tried. Wasn't there a size limit for the
commit metadata or something that got overrun by large commits and made
this not work? Was something done to fix this?