When I edit long mails with quotes, the editor randomly jumps to the end of the text (by the signature).
It makes edition of such mail very painful as the focus is lost.
This may happen every tens seconds.
I can not figure out in which cases it happens.
This is a known issue with the Slate-based composer editor when working with long emails that contain quoted text. The cursor jump to the end appears to be triggered by the editor re-rendering in response to auto-save or other background events, which resets scroll and focus position. It affects both macOS and Linux users. There’s no perfect workaround right now, but a few things that can help: collapsing the quoted text (click the ... toggle) before editing reduces the editor complexity, and writing your reply in a shorter window sometimes avoids the trigger. This is something I want to fix properly — the root cause is in how the editor handles focus after async updates.