Popup - parent element not found

When trying to get the data from a popup, I get 'parent element not found.

I can replicate the issue on websummit for example, see the example sitemap:

Url: Meet the startups that joined us at Web Summit 2022

Sitemap:
{"_id":"websummit-2022","startUrl":["https://websummit.com/startups/featured-startups"],"selectors":[{"id":"selector","parentSelectors":["_root"],"type":"SelectorElement","selector":"a.MuiPaper-root","multiple":true},{"id":"clicker","parentSelectors":["selector"],"type":"SelectorElementClick","clickElementSelector":"_parent_","clickElementUniquenessType":"uniqueText","clickType":"clickOnce","delay":500,"discardInitialElements":"do-not-discard","multiple":true,"selector":"html"}]}

When trying to create a selector under clicker, it does not work and is not clear to me why.

Edit:
The issue seems to exist when the parent is in a different part than the opening popup, looks like there's no way around this.