How to debug a worker (Nuxt site) that sometimes just doesn't load on a cold start?

[buoyant plinth]

It just never resolves, endless loading. It is connected to a db but it's D1

interestingly it loads instantly in incognito browser, but in my main browser even after clearing site data, no loading.

Edit nope it's stopped loading in incognito now. Very odd

[buoyant plinth]

I'm getting random failed query, does that mean it's struggling to connect to d1?

if I put the same query into d1 query it loads fine