Frontend on Vercel needs extra refresh because data can't be found

When I search my vercel.app domain (frontend), after not searching it for a night, it always needs an extra refresh for it to load. It is because it can't find the up.railway.app domain (Strapi backend) data on the first search after a longer time. Anybody experienced the same thing and knows how to fix it? Additional question: It feels weird I don't need webhooks, because if I add something to my data it automatically displays on my frontend already. Do I even need them? Thanks Project id: N/A