Reproduction Steps
On a Mac, send a GET request to https://setup.rbxcdn.com/mac/DeployHistory.txt and look for the latest Studio build. You will see 2 deployments labeled “Studio” with the same version number.
Download the first one (the build with the earlier date) using the URL https://setup.rbxcdn.com/mac/version-HASH-RobloxStudioApp.zip. Within it is the RobloxStudio.app. Extract and launch it and it will open as normal.
Download the second one (the build with the later date) and extract and launch it. Unlike the other build, a China version of Studio will launch, apparent by the bottom bar:
It appears that all second deployments are CJV ones.
Here’s an illustration where Blue is Global builds and Red is CJV builds:
It would be nice if, in the DeployHistory, there was some way to determine if a given build is CJV or not (maybe https://setup.rbxcdn.com/mac/version-HASH-isCJV?) so we could avoid these in custom bootstrappers.
Workaround
Avoiding the second build ever published with a given version. (not entirely reliable)