Investigate issues with deep loading getting stuck

[aeplay]

[gdorsi]

Managed to create a minimal repro for the issue that was affecting me: https://stackblitz.com/edit/vitejs-vite-tnreze?file=src%2F2_App.tsx,src%2Fmain.tsx,src%2F1_schema.ts&terminal=dev

It tourned out that in my case the sync was failing silently when one of the requested fields is null.