ADF Activity Fails But Pipeline Run Succeeds - WTF

Hello! Since August last year I’ve had to pick up a number of new technologies, one of these being Azure Data Factory (Version 2 to be clear). And there’s a clear correlation between how much I enjoy using a technology compared to how long I’ve used it. And when it comes to ADF I’d say that I’ve hit a point of not enjoying it at all. Aside from the fact that it is practically impossible to test, the developer experience is a web page/drag and drop affair, and that the source control integration is rubbish (oh wow a blob of json to compare manually, what fun), the thing that’s really got me all angsty today is something totally unexpected, yet undoubtedly something someone somewhere would call “a feature.