* Notification emails for PMs don't include the sender in the body at all. Those that do have the sender bolded on a line by itself. So I am not sure what you're referring to here. Maybe you're using a self-hosted server running an old version? We did a total redesign of missed-message emails in 2019. * When closing the compose area, Zulip saves message content in the "drafts" feature, so one never loses partially composed work: https://zulipchat.com/help/view-and-edit-your-message-drafts. * I was able to reproduce the uncollapsing bug as https://github.com/zulip/zulip/issues/15808, and fixed it a couple minutes later. Thanks for the report! * The issues around CPU load, reloading and server issues are probably best discussed interactively, since I'd like to see browser profiles for your situation and understand if you're using a self-hosted server that might be underprovisioned, which seems a bit much to work out on a HN thread :)
-Zulip lead developer