Hi, thank for your feedback. Yes that's because Movim download locally all blog items and may then query its local database, SàT is retrieving blog items on demand without keeping local copy. I'm currently thinking about adding a local copy for blog/pubsub items too, but in a way that may be configured/disabled, as it's not resource wise to keep a copy of the whole universe locally, even if it's trendy these days (Mastodon, Matrix, Diaspora are all doing that if I'm not mistaken).
Manage hashtags in blogcreated
In its blog part, Movim has hashtag support. Libervia has not. It would be nice to have that in SàT, especially if there is the will to make it a popular tool for "IT social networking".