If an agent is typing an Email (under Chatter component) and edits a field on the Case record, hits Save, then the written Email disappears (as all components on the page are refreshed).
This might be standard SF behaviour but wanted to confirm - Is there a way in which the Email section is not refreshed whenever a Case record is saved? It's inconvenient for users to have to write emails separately in Notes and then copy them over to workaround this behaviour.