WORDPRESS: New Speculation Plugin Ruins Core Web Vitals

[Jan R]

Hey Team, I found that the Wordpress Speculation Plugin does the following: It prerenders pages that might be clicked. BUT: Obviously the pretender is gapping slowly NOT reflecting real rendering. Consequently the LCP and even worse the CLS jumped in direction of needs improvement. In reality Cloudflare and Argon are delivering fast so the CLS is NOT happening within a threshold time and Pagespeed CrUX does not count this als CLS. So Our values worsened Feb-> March. Deactivating the Plugin and all went back to normal. So this is something stupid. The Speculation is helpful for UX but CrUX is counting this rendering against us. So can CrUX please EXCLUDE the speculative pre-render performance? Thank you!