thanks - I tried that  - clearing cookies, cache etc and even a different browser - neither helped.

But then after an hour or so the issue cleares up - within the same session - and then after a few minutes starts happening again.

the latest problem is that my code changes are not being reflected in the task / job runs.

e.g. I remove or amend a line of code that prints out a message - but when I run the job, the old text message still appears.