Hello! I am currently investigating this. We've already made some changes in the new editor that will help (not yet deployed) and I am currently working on identifying the issue in Euclid. From my initial observations, it appears the issue is tied to the "mentions" system, as previously reported. Euclid disables the autosave for the current field when the search appears (to prevent search queries while typing from being saved and making the form refresh, which closes the search field). Once the search field is closed (ie, selecting a result, continuing to type until it realizes you aren't searching, leaving the current editor field, or manually closing with [Esc]), it fires an update to re-enable saving for the field, which appears to be re-enabling the autosave feature until the page is fully refreshed.