Sounds like a pretty ordinary bug, combined with people not knowing what "experiment" means in the context of Chrome. When new functionality is added to Chrome

Sounds like a pretty ordinary bug, combined with people not knowing what "experiment" means in the context of Chrome. When new functionality is added to Chrome (or Firefox, or most other large software projects with automatic updates), you don't add it for everyone at once; if you did that, and it turned out to be buggy, everyone would be exposed to the buggy version. Instead you roll it out for a few users, and gradually expand the subset of the userbase which has the feature, while watching for both automatic and manual bug reports. If the bug reports don't come in, you enable the feature for everyone. While the feature is turned on for some people but not for everyone, it's called an "experiment".