I am currently working on a project that keeps getting inconsistent scoring by fluctuating from >= 20 to <= 80. At first, after I applied the fix have it upgrade and reindex/recache the website we got a consistent scoring of >= 70 to <= 80 on both mobile and desktop for a day and the website itself is fast. As day goes by it suddenly went astray then fluctuates too much, and coincidentally when we see the score fluctuates the website speed somehow degrades.
Magento version: 2.4.2-p2
Full Page Caching: Litemage
Hosting: A2 Hosting
We also did database optimization and still got the same result, further fixed css/js and still got the same result. It doesn't make sense that it would be consistent for a few hours or even for a day then suddenly went haywire.
Any thoughts or ideas on how can we pinpoint what's the real issue? Is it server related issue?