user93439: If so is there a way to prevent this from happening?

user24925: It walks back a small number of blocks and re-verifies them, this ensures there's no obvious corruption and warms the cache. It takes a few tens of seconds at maximum on most hardware. You can adjust or effectively disable this using checklevel=1, but it is generally inadvisable to do so.

93439: <p>If so is there a way to prevent this from happening?</p>
 24925: <p>It walks back a small number of blocks and re-verifies them, this ensures there's no obvious corruption and warms the cache. It takes a few tens of seconds at maximum on most hardware. You can adjust or effectively disable this using <code>checklevel=1</code>, but it is generally inadvisable to do so.</p>
