This property records the hardware hashing algorithm used to distribute multicast traffic across this port channel's member links. The specific hash algorithm in use determines how evenly multicast streams (as opposed to unicast, which typically hashes separately) are load-balanced across the channel's physical members, which matters when one member link runs hot while others sit idle. If this hash value indicates a source-IP-only hash and most multicast traffic originates from a single source, that would explain why one member port in this channel is consistently more loaded than its siblings.