Quick Look Sometimes Fails

I’m finding that the Quick Look function sometimes fails to display a map properly. With one such map, I dragged and dropped its contents to a new map, with the following result (the copy displays fine, the original does not):

[attachment=0]Screen Shot 2021-01-17 at 7.56.26 AM.jpg[/attachment]

If you know what’s wrong with the original map, please let me know so that I can make all my maps work with Quick Looks (and when displayed in Scrivener). If not, perhaps the two attached maps will help you figure out what’s going on.

Scapple version: 1.4.

Note that in some situations, the problematic map displays fine:

[attachment=0]Screen Shot 2021-01-17 at 7.56.57 AM.jpg[/attachment]