Trouble with a website using IPv6

Had an issue for a few days now trying to reach

https://ilibrary.co.nz/ which is the Invercargill Library.

Talked to their IT support guy this morning and he says its all 2 degrees customers and VF customers who use IPv6.

Turning off IPv6 and just using 4 is fine. IT support assure nothing has changed at the Library site, and he suggests its a routing issue with the above 2 ISP's.

Perhaps 2degrees could look it is, but its no biggy.

thanks