Some items on a page are not selectable

I often encounter an issue with DistillWeb-addon in Firefox on different sites:
I click “Monitor parts of page” and click on an item on a page but it does not become selected.
Here is a video explanation: Distill web issue - YouTube
How to fix it?

Thanks for reporting this issue. It looks like a bug that we haven’t handled in this website. Can you please share the page’s URL? I will check it out and get back to you.

Here is the URL: