ATTO Editor not purge "not saved" draft

In ATTO Editor of qualifying form, if put a message and not save or cancel form, the message persist in mdl_editor_atto_autosave table.
There seems no exist an automatic process of purging records for these autosaved records.

if we filter A students for qualifying, the URL of the first student is the same of the B student filter. Therefore ATTO reload the feedback of first A student in the first B student filter.