When I post a note, any pasted links are linked, when I comment on things, pasted links are not. I think that in both cases the user would like to see a working link.
Here's an example: https://fmrl.me/habi/note/4n5JbstsRNKLzaENP9SMXg
This should probably work fine when #365 is done.
I'm going to close in favour of #365.