There seem to be a number of serious bugs with calculated fields. I think most people are familiar with the issue of creating a calculated field and then it's not actually created, or only being able to create one calculated field at a time. This issue is probably caused by lag; Looker can't sync with the changes fast enough and reverts to its most recent version. Sure I can understand that in the free version, but feels unacceptable when you're paying for the pro version. Raise prices if you have to. I just want a reliable product.
The bigger issue with calculated fields is when they are randomly deleted out of the blue. I created some calculated fields a few weeks ago and this morning, a few of them were deleted. The others were similar calculations and were fine. Not sure why those alone disappeared. It's really annoying when this happens and all your visualizations break.
Looker team, this is embarrassing. Having calculated fields feels like one of the absolute most basic functions of your product. Please get it working.
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