user62633: Several block explorers are reporting that the nonce value in many block headers is 0. For example, blockcypher,
Why does this happen?
Where can I get the actual block headers?

user48884: This appears to be a bug in their software (i.e. it occurs for no reason other than it's a mistake) so you should report this to Blockcypher.

62633: <p>Several block explorers are reporting that the nonce value in many block headers is 0. For example, <a href="https://api.blockcypher.com/v1/btc/main/blocks/294327" rel="nofollow noreferrer">blockcypher</a>,</p>

<p>Why does this happen?</p>

<p>Where can I get the actual block headers?</p>
 48884: <p>This appears to be a bug in their software (i.e. it occurs for no reason other than it's a mistake) so you should report this to Blockcypher.</p>
