Elixir Ivy v1 Stack not working in RW7

I’m still using Ivy v1 Stack but since upgrading to RW7 (latest version) I realise in preview mode the Ivy accordion Stack is not collapsing.

Does anyone know if this stack needs updating to v2 to work? I’m not really wanting to buy it again but I’m stuck at the moment editing the site and worried republishing will make it not look correct.