When your company buys a third party solution and you spend all your time emailing them about bugs in their system.

Seriously, I even sent you the exact line of the bug in your JavaScript with a suggested solution, and deployed a new stack with your latest (broken) fix so you can test out that solution. Then you email back saying it is fixed but it is clearly still broken. If I email you a fixed version of your file will you deploy it? OMG!