Delay a release? Sure. But delay a snapshot? Why? By releasing the snapshot in this state, they learn both 1) how big of a problem those known issues are (how often does entering exclusive fullscreen crash the game on Windows? They presumably have telemetry for this), and 2) if there are other, as of yet unknown issues they need to fix before release. The earlier you learn these things, the better.

There hasn't ever been a promise that snapshots are bug free; the expectation is rather the opposite.