When reblogging a post from an RSS feed, the reblogged post has the correct (RSS) icon for the original author when viewed on the device where it was imported:

But when the reblogged post is viewed on a contact's device, is has an identicon and a trust indicator for the original author, instead of the RSS icon:

If the contact reblogs the post again, the twice-reblogged post has an identicon and a trust indicator for the original author on both devices:

I guess there's a bug in the code that finds the root post and checks whether it comes from an RSS feed.