================== UPDATE ======================

 

FireFox is also doing the same thing now. I have also tried it on separate machines. It is even doing it on this forum editor. So is it a memory issue? Refreshing the page or closing the browser does not fix it.

 

Here is the steps I used to re-create:

 

1) Create a new list (it doesn't matter which kind) via the toolbar

2) hit 'Enter'