Page sometimes fails to load on mobile

My question is about two of my sites. poetic-kashata-5942fa and delightful-rolypoly-b12dde. Everything works fine on desktop, but on mobile sometimes the page takes a long time to load and eventually fails to load assets like css, images etc. Wondering if there is some additional configuration or something else I can do to improve this. Appreciate any help. Thanks.

We would need a HAR file or some logs to see what you mean by takes long time and fails. It appears to work fine for me.