This coin page
displays only the information till the info about mint (Obverse-Reverse-Edge-Mint). You can not scroll it down to see another information, and it effectively means that you can not add or remove it from your lists.
Yes, I tried it in another browser and also in my smartphone, it looks the same damaged. I tried another coins, all that random coins pages works as previously. So it makes me to think that this is a specific problem with this exact coin page.
Would be nice to fix it.