Activity comments asset is incorrect with multiple media
When there's multiple media in a CB Gallery activity entry the comments asset is being set to the last media entry uploaded. It should however leave comments specific to that activity entry in this case. It should only override when it's a single media entry.
Comments on activity entries with multiple media should store comments specific to that activity entry.
Comments on activity entries inside of an album should store comments specific to that album if there's multiple media.
Comments on activity entries specific to a single media entry should store comments to that media entry.