After the latest update there is small issue with multi-image posts.

For example:

www.instagram.com/p/BQ4o2LtD2wV/

At the bottom them there are slider dots.

But on the website I do not see any option to slide through images inside multi-image post.

Second picture from the top:
lubimka.info/en/en-stream-of-consciousness/#

Hello Zox!

Thank you for posting about this!

Instagram has added the feature of multiple slides, but unfortunately it does not provide data for the slides in Instagram API yet. It currently gives the screenshot of the first item only (image or video).

We are tuned to the main changes in Instagram, so we'll add this feature as soon as its API provides necessary data.
Thanks! Have a great day!