CLS increases

Had a look, but Desktop CLS is but 0,03 (under lab data, the CLS for origin summary is 0,28 but that’s irrelevant because is is an aggregate of all your site’s pages of the last 28 days)?

Google Pagespeed sees 0.04 now;

GTmetrix indeed sees more, but none of the DOM nodes mentioned as contributing to CLS are related to LYTE:

So I have no idea what the issue is/ how to fix I’m afraid.

Actually, no; LYTE uses a placeholder of the exact same size to avoid content shifts, you can even see (part of) that in the gtmetrix speed visualization:

Don’t see a layout shift on Pagespeed either I’m afraid;

Upload it somewhere (I use imgur.com) and then paste the image URL and/ or add the image URL in <img src="">.

No idea why you’re seeing this while I am not I’m afraid.

I retested on webpagetest.org -on a 3G connection to make things more obvious- where you can see a filmstrip view at a 60FPS interval and even there I do not see what you saw on Pagespeed Insights:

Conclusion: I have no idea why LYTE would cause CLS here and I have no idea how to solve that for your, sorry ..

You’re welcome armendav.

still no idea what is happening there armendav :-/