Contextual Journey page is unresponsive

Summary:

We created a contextual journey based on the quick action Me --> Performance. It was previously working, but now when try to start the journey the page is unresponsive.

If we wait long enough it eventually loads, wasn't doing this before.

Any ideas what could be making the page unresposive?

Content (required):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):