There's an experience in the old times, that newcomers don't relate to in the same way: wait times. Still so much dysfunctional agile that this appears, but the emphasis is going down.
- Your developers are working on a feature and you can participate in designing, think through your strategies and tactics while waiting but there's a feeling of waiting until developer feels tester contribution is warranted. The smaller we learn to make the changes, the less this is an issue.
- Your test environment is broken. While you could test, you could only report on the fact that the older web server version really isn't compatible with your software after the decision to support a newer infrastructure. Or the other project's feature just broke what you were supposed to focus on because the environment is shared.
- Your build is broken, something went wrong with integrating the pieces together. Most likely it's not one of the pieces since pieces have owners, but whatever is in between the pieces and stops them from communicating, you work hard to find someone who even starts to look. After all, it could be somebody else's problem.
- You've found so many bugs that your head is buzzing, and you can't focus in trying to find some more before some fixes arrive.