I have two separate WPT tests for the same url recorded before and after deploying a change:
When I go through each run individually for those two tests, I can see that the LCP element is our cookie-consent modal consistently. However when I go to compare view for these two tests and look at the filmstrip:
The LCP frame for the test titled “after FB SDK removal” is a frame at 2.1s that is not the coookie-consent modal. Is it just a bug in how the time is recorded and the filmstrip display logic? Or is there something weird going on here?
Also, tangential question: does the compare view use the first run from the selected tests when showing the filmstrip comparison and other metrics on the page?