Hi all,
I have a web app on AGOL which uses one of the provided basemaps and a simple point vector layer. The pop up boxes on the app look great!:

But when this map is embedded into our website, everything still looks great apart from the pop up boxes which change to some nasty 90s style box! what gives?

Clicking the > button on the pop up leads to the whole web app being taken up by the pop up box!:

Thanks,
Theo