This might sound weird, but before Pectra EL clients didn’t have to “know” that the deposit contract was special because the CL just read from it directly. Now, because deposits can be triggered by the EL and aren’t delayed by 2048 blocks (to account for PoW reorgs pre-merge), they do. This issue was triggered because the Holesky (and Sepolia) deposit contracts are at a different address than mainnet. Why? I have no idea 😅