MentionsLine Parsing problem with Markdown posts

Source:

mew @tusooa

- xxx @tusooa
- @tusooa

Backend returns: <p>mew</p><ul><li>xxx <span class="h-card"><a class="u-url mention" data-user="A5pEIeHPm5c7YxJA9I" href="https://kazv.moe/users/tusooa" rel="ugc">@<span>tusooa</span></a></span></li><li><span class="h-card"><a class="u-url mention" data-user="A5pEIeHPm5c7YxJA9I" href="https://kazv.moe/users/tusooa" rel="ugc">@<span>tusooa</span></a></span></li></ul>