I was of the idea that the information from bitnodes is reliable. But that changed when I looked closely into the information I get from running my node.
There are IP addresses in the addr field for outbound connections appear in the list of nodes they crawl every 6 min, but there are IP addresses in the addr field of inbound connections that do not appear on bitnodes. Does anyone have an idea what these entities are? (if they are not nodes?)

Additionally, some peers have the addrlocal field set to 127.0.0.1, while most have my IP address. Any reason why?