(In reply to Dave Hunt [:davehunt] [he/him] ⌚️UTC from comment #7)
Record/replay from raptor-studio works fine, but replaying through Raptor itself I get the black background and not scroll content. I'm not sure what would be causing this.. Is it possible that Raptor is somehow causing the page load to end early? I've turned on verbose mitmproxy logging and don't see any requests for the additional content.
Any ideas what might cause this :rwood?
Once Raptor has received all the expected measurements from Firefox then it will deem the page-load complete and start the next cycle - so if the last event ('loadtime' I believe, or maybe 'ttfi') is made available by Firefox before the scroll content appears, then Raptor will move onto the next page cycle.
One way to check is to run Raptor in --debug-mode and then it will leave the tab and page open on the last page-cycle instead of closing it, then it will remain open after the last event was received.