Scratchpad - content lost on closure

2.9.0.24 Beta (697194) 64-bit
Using Scratchpad alongside Composition window. After creating and writing in a fresh note and then closing the S/pad window via the X icon, when I reopened S/pad, my new note, though listed, had lost all content and was blank.

This happened once and I have not so far been able to repeat this issue.