Comment by OwainX

We found an issue where the stacktrace was originally enabled in our code twice so when it was switched off it was being overridden. That's been fixed. Adding better form validation for the button creation form is also on our list. Our primary focus as we receive bug reports is on issues that directly affect server creation, deletion and billing as those are the highest impact. Since the button form just creates a shortlink and saves some text it's a lower priority but we should have significant improvements in place for that page in the next week or so.