Bug Quest: Invisible Bond Drawing

[weasel]

There's a bug I've noticed a few times but I can't reproduce it, so I'm looking for help.

In the editor, you can get into a situation where you can still draw bonds just fine - but the actual red/green placement graphic is missing.

If you can tell me exact steps to take to produce this result, you'll earn a cookie!

[darkeagle]

Hm. I can't make invisible bonds, but I used to be able to make invisible elements. But now you fixed it. :P

[JayJSE2]

you probably fixed it without realising

[weasel]

Nope, I saw it crop up again yesterday when I was fiddling in the level editor. I think it has something to do with loading from ?edit=xxx and swapping back and forth from the test function.