Hi @Willem_Reyners_Tay, it might be that the interactions you are using are not supported by IE, which has issues with modern css animations, transitions and flexbox (as an example).
A good place to check what advanced css features are compatible with IE is caniuse.com.
For a flip interaction, it may not be possible to render that normally in IE, you might consider adding a little custom code to display some element other than the flip card when a site visitor is using IE 11 or lower.
The animation should work in Edge browser though. Microsoft has stopped supporting IE 11, for this reason, Webflow recommends to clients to upgrade their browsers to get the best experience.
I hope this helps