Hashtag is not detected when it stands next to a html link without spaces
It comes from this issue pleroma/pleroma#2021
BBCode doesn't wrap text with a p tag as Earmark does, also it replaces \n symbols with <br> tags with no spaces. Linkify can't detect hashtags in some cases.
I used pleroma iex console to call linkify link_map function: Linkify.link_map(text, %{mentions: MapSet.new(), tags: MapSet.new()}, [hashtag: true, hashtag_handler: &Pleroma.Formatter.hashtag_handler/4]
Failed cases (empty tags MapSet):
"#cofe<a href=\"https://pleroma.social/\">Source</a>""#cofe<br><a href=\"https://pleroma.social/\">Source</a>"
Successful cases (tags: #MapSet<[{"#cofe", "cofe"}]>):
"#cofe\n<a href=\"https://pleroma.social/\">Source</a>""#cofe <a href=\"https://pleroma.social/\">Source</a>""<p>#cofe<br><a href=\"https://pleroma.social/\">Source</a></p>"