Block storage is XOR'd because this was happening from just random tx data. This hasn't been the case for years and won't be the case
GitHub
blockstorage: XOR blocksdir *.dat files by maflcko · Pull Request #28052 · bitcoin/bitcoin
Currently the *.dat files in the blocksdir store the data received from remote peers as-is. This may be problematic when a program other than Bitco...
