Both Firefox and Chrome freeze when trying to edit Channel Display Module

[fenderbob]

Ever since upgrading to 5.2.2 I am unable to make changes to the Channel Display Module in both Chrome and Firefox. Chrome totally freezes. Firefox gives an "unresponsive script" error where you can stop the script.

Not sure if it's just me or if its everyone, but I'm reporting this.

Editing other modules works just fine.