retain squash commit message

When marking a MR to be auto-merged and squashed on successful pipeline, if the pipeline fails, or the auto merge is cancelled for any other reason, the squash commit message that was entered as the "edit commit message" is lost. It would be nice if there were a way to retain that instead of having to retype it all. As a workaround, I often end up writing my commit note in a text editor somewhere, pasting it for the auto-merge just in case the pipeline fails, but sometimes I forget to do this and end up having to rewrite the commit note.