"A problem repeatedly occured" error iPhone safari

I'm not sure if there has been an iOS or safari update that's caused this, but I've just noticed that at some point recently my model viewer pages have stopped working consistently on safari on iphone. Every other device and browser seems to work, it's just safari that crashes. With a clean cache it'll load once, but as soon as you reload it crashes. Example can be found here https://ar.rivr.uk/warwickcastle. This page was working absolutely fine previously, and it is happening to all similar pages, so I assume it's from a recent update?