Noticed that too. For both the Alpha and Beta. My (Guess) is that there’s a lot of under-the-hood changes to the code generation / compilation backend happening right now. Work that started for 2021.2 and now even more massive changes to the .NET support, IL2CPP compilation in 2022.1. All of that probably creates a lot of instability and requires much more regression testing.
Just take a look at this thread: Unity Future .NET Development Status
It’s not a small undertaking.