You might consider installing on your moodle site my new Block: Display Lesson Essays Feedback & Score to students. See this discussion, which contains the link to the Modules & plugins database address for the block.
If a student wants to resume a Lesson activity containing one or more essays from a previous submission, she can
- click on the Lesson link in the Display Lesson Essays Feedback & Score to students block,
- copy her previous essay(s) answer(s) to the clipboard,
- paste to a simple Notepad,
- then go to that Lesson activity
- and paste her previous answer(s) to the relevant Essay...
PS.- I hope this will encourage Lesson users to install and test that block, for which I have so far received a grand total of zero test reports.