Try to do a post with <a class="hashtag" data-tag="doestrendingtopicssupportveryveryveryveryveryveryveryverylonghashtag" href="https://playground.bonfire.cafe/hashtag/doestrendingtopicssupportveryveryveryveryveryveryveryverylonghashtag" rel="tag ugc">#doestrendingtopicssupportveryveryveryveryveryveryveryverylonghashtag</a> an horizontal scrollbar will be displayed in the compose box, i do a mess
but i'm tired, so i go to sleep and stop trying to discover the limits of the playground <a href="https://playground.bonfire.cafe/hashtag/doestrendingtopicssupportveryveryveryveryveryveryveryverylonghashtag" target="_blank">#doestrendingtopicssupportveryveryveryveryveryveryveryverylonghashtag</a>