Users don't understand the purpose of bridge-moji

A user provided this feedback on frontdesk:

I like all of these changes except for the Bridgemoji. I think it's better to direct users to the hexadecimal fingerprint. There's no place that needs typing in an emoji, and emoji keyboards are only on mobile OS. I can't search by emoji or utilize emoji in any way except to visually compare it to another set of emoji.
Besides having low value, four of them is too many. I might remember two emoji, but I'll never care to remember four of them. If you choose to keep Bridgemoji, then try to condense it into one or two emoji. Look for alternative methods of representation as well such as those made for user icons.
https://en.wikipedia.org/wiki/Identicon
https://robohash.org/
I think it's better to direct users toward the hexadecimal fingerprint and for bridges, the hashed fingerprint.