The Core Web Vitals for desktop on my site are dropping all the time, even though mobile is fine. I've spoken to my hosting company BigScoots who said the following:
"It seems as if the image is being delayed from loading initially, even thought it's being optimized. Unfortunately, there isn't anything we can do to assist with this because the optimizations are via Ezoic LEAP which we have no control over. You'll want to reach out to Ezoic support for further assistance with the Desktop LCP issue, as they may be able to tweak things on their end."