Hi!
I've been having some issues with a black screen when exporting my game for web. If I do a remote preview it works just fine. But when exported and uploaded to my website, it doesn't work on iPhones/Safari, but it works fine on Chrome and Android phones.
I'm using the r204.2 version, and construct 3 runtime. Tried it with and without the Web Worker enabled. I think the problem started when I started using the AJAX object. I'm not using any custom plugins.