Success! Looks like we've fixed this one. According to our records the fix was applied for
Unanswered: Mock Data Tabs Stay Open after Switching Fiddles
This isn't a huge deal as it doesn't technically break anything, but I noticed that if I'm in Fiddle A and open one of Fiddle A's mock data items (which creates a tab in the toolbar at the bottom), the mock data tab from Fiddle A will remain open and active even when I switch to Fiddle B or Fiddle C.
As I mentioned, it doesn't technically hurt anything, but is a tad confusing.
For an example, start here (https://fiddle.sencha.com/#fiddle/km) and open the "loadtags" data tab.
Then switch here (https://fiddle.sencha.com/#fiddle/je) - the "loadtags" data tab remains open.
Sorry, this thread seems to have slipped by. Will see what I can do but may not make 1.0 GA.
Thanks for the report! I have opened a bug in our bug tracker.
This should be in tonight's push
Looks like did it--thanks!
Before pasting your code, see if you can make a working example using Sencha Fiddle
Not only will it let everyone see what you're talking about with their own eyes, but it also makes debugging your issue 19 billion times easier
Embedding your newly created Fiddle is super-easy: Using Sencha Fiddle in the Forums