Why would a guy randomly block you on snapchat?

I’ve been speaking to a guy on snapchat for about 2 weeks. We talked every day and he always sent me good morning messagesc etc.

The other day we were talking as normal, and he sent me a cute good night text, then the next morning, I realised he had randomly blocked me. Completely out of the blue.

Anyone have any theories on why he would do this?
Why would a guy randomly block you on snapchat?
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