Layout Shift - Again!

Hi!

You kindly helped me with a previous issue with layout shift.

On your advice, I ended up switching to a system font which eliminated a lot of my issues.

I also moved away from Nitropack, which was causing all kinds of problems, and switched back to WP-Rocket.

The new issue is WITH DESKTOP CLS ONLY (mobile is fine).

On about half of my pages, Pagespeed Insights is sporadically reporting a big layout shift (desktop only), telling me it's being primarily caused by:

div class "inside-right-sidebar"

Some pages where this is happening include:

https://www.homeworkingclub.com/free-online-training/
https://www.homeworkingclub.com/flexjobs-review/

I do have a sticky ad unit from MediaVine in the sidebar and know that they can cause layout shift issues - they are working on this. If you can categorically tell me that's the only thing causing it then I can just leave it alone now and wait but I want to be certain I've addressed every possible layout shift issue that's under my control!

Thanks in advance!