Hi there, so we fixed this issue in this PR on Febuary 24th, 1.9.1 is actually from Febuary 9th. So as soon as @jwr1@kbin.earth upgrades this is fixed null
The reason we do not use the url property: according to the Activity Vocabulary which is part of the standard, this property
Identifies one or more links to representations of the object
Which the links in mbin or lemmy just don't fit. Multiple other projects would handle this property as the "original url" (including Mastodon).