Instagram wtf

Somewhere I like has an Instagram account and a Twitter account that looks very much like a bot going 'Look! We just posted on Instagram'.

OK, they probably don't actually read the Twitter one, so if I am to do some feedback, I need to go to the dodginess that is Instagram. I think I manage that.

But now, if I click on the link in the tweet, I see the post in question.

If I log in to Instagram and click on exactly the same link, I'm told that "Sorry, this page isn't available. The link you followed may be broken, or the page may have been removed."

WTF?

If I look at their page, same thing happens.

Is this what happens if you're blocked by the account in question?

If I look at the post I think I commented on when not logged in, the number of comments on it is zero...