Only the person who issued the Like sees the ARG error (anyone else sees the Like in the correct manner). So it's a bit of an edge case that they would use that to try and check out their own profile.

Problem is that the Likes system on FT is bespoke for FT, the techs who developed it have moved on, and as it's a cosmetic issue that affects only the person who issued the Like, there's not a strong business case to invest the time to fix it.