We have worked hard on producing a PWA and we’re on the final stretch. The problem we’re having is that when doing a test at webpagetest.org and using an emulated Moto G4 with Chrome, we are getting a bunch of undefined 204 responses in the waterfall. I am finding it almost impossible to debug since I don’t see it in dev tools and there is nothing actionable in the header requests. Initiator line is always blank “” although it appears it is looking for an image.
The app seems to function as it’s supposed to but obviously something is wrong. From document complete to fully loaded, these are causing an additional 1 second of wait time and it matches a lighthouse test for Time to Interactive. The site is pressertech.com and it is a wordpress 5.4 site.
Here is a copy of a recent report from webpagetest.org https://webpagetest.org/result/200617_SJ_43de9efaeb3c905c84df4f48c6be58aa/3/details/#waterfall_view_step1
Any help would be appreciated. Thanks.