On the fediverse, we now try to deliver replies to all upstream authors in the thread. This is complicated, and varies by ActivityPub implementation, but we now more closely match common inbox delivery and notification conventions, so fediverse users should now see and get notified of bridged replies more often.
Hopefully fixed a persistent issue where replies, likes, reposts, and quotes sometimes wouldn’t get bridged to Bluesky if they post they depended on hadn’t finished bridging yet. Another complicated one, still keeping an eye on it for now.