Hiho!
We're currently looking into this issue but are not able to repro locally. As others have already noted, it's a problem with shader cache and disabling "Enable Shader Pre-Caching" should resolve it for now.
Could you share some details on your setup with us? It might help us pinpoint the exact cause for issues like this.
Feel free to PM me if you don't feel confident sharing info in a public thread.
Cheers!