The user's bio contains a hotlinked image from the iplo.ru address. As it's behind a spoiler, and as the iplo.ru domain seems to not point to anything (or maybe it's inaccessible here in the United States), this was hard to find on the page itself.
After browsing the page source with Developer Tools, I discovered the hotlinked image. It seems that Chrome ...
You're only ranked in the reputation league database once you get more than 200 rep on a site and that only happened today for this user on Politics.
Wait 24 hours for the nightly job that calculates ranks and the rank should appear.
Looking at the page source - looks like
<img src="https://i.imgur.com/VLNp278.gif" width="440" height="65" alt="l'L'l™" title="l'L'l™"><br /><img src="https://iplo.ru/1QFh87.png">
That's causing it. That's the broken image link on their profile.
Unamusingly, pasting that link, before formatting causes my chrome based browser to throw me ...
I just tested your example question and example profile using Microsoft Edge 44.18362.449.0 and in both cases:
when I mouseover the spoiler it appears
when I move mouse away from the spoiler it disappears
Then when I test clicking the spoiler and moving away:
for the example question it stays
for the example profile it disappears
Consequently, this ...