I work in the webhosting industry in unix server administration. Over the years I’ve had to support a variety of 3rd-party software products such as hosting control panels like Plesk and CPanel, as well as CMS systems like Joomla, Drupal, WordPress, various platforms, configurations, etc the list is endless. At times, these vendors can push out software updates that will in turn break a customer’s website, server configuration, or cause an incompatibility etc, that is completely beyond my control. The vendor in this case needs to then release an additional patch to fix the issue, all the while I’ll still be expected to fix the customer’s website and get it back to a working state for them.

That being said, one time Plesk in particular had recently released an update which had caused a number of new issues, I don’t remember the specifics, however while trying to explain calmly that this was not something me nor my employer had any control over but was an issue caused by the vendor, in exasperation I said “I’ll fix it, when its not broken!”