nostr:npub1ht0rq2ej339cv0nz4m260llgdq8mz05fwpz4zjc8s7lmtduzq8hq60dyc3 in the olden days, I would have suspected a hard disk partial failure but I don't know if it's a thing anymore or how to check. That said, you might want to backup important files just in case your disk is feeling blue.