Minor fix for a problem with a particular, newer version of Cosmos. We were going to wait for Corona 10, but as more people updated their Cosmos, it became a more immediate problem, so we released the HF. It still wasn't that many affected, and if someone was affected they'd report a problem, and we'd tell them the solution of downloading the HF3. Meantime if no-one is experiencing issues, there was no need for them to update to HF3 with 10 being so close, hence no announcement.