New PostgreSQL cluster doesn't achieve healthy state

I just wanted to start the migration of a project to fly.io, so I created a new PostgreSQL cluster (osmcal-db), but it seems to refuse to start:

STATUS           	HEALTH CHECKS                 
running (replica)	3 total, 2 passing, 1 critical
running (leader) 	3 total, 2 passing, 1 critical

I sshed into it and it’s seemingly this healthcheck:

curl http://localhost:5500/flycheck/pg

"failed to connect to proxy: context deadline exceeded"

Am I holding it wrong?

No idea what happened, but I checked again today and it fixed itself…?