Unfolding selected handlers doesn't work

If you select a folded handler and select “Unfold” in the menu it doesn’t unfold.

I found this by folding all handler, then selecting three I was debugging and choosing unfold.

If I click in folded handler first line so the insertion point is there unfold works. It’s only when the entire handler(s) is selected that it fails.

I can reproduce this problem here. We’ll get this resolved in a Script Debugger maintenance release. The workaround is to click on the fold/unfold buttons in the script editor margin.