What do you mean exactly by “it refreshes”? Our free tier spins down after 15 minutes of inactivity, so the first request after the service is spun down make take a while, but subsequent requests should be faster. Is that what you’re observing? More info related to this here: https://render.com/docs/free
I have noticed this behaviour only twice since deploying the app yesterday. After a few minutes of inactivity from the user the app restared losing all outputs from the computations.
However most of the times this does not happen.