postgres timeout errors

I have a fly app that talks to a fly postgres cluster on the same region, I noticed that since 17:54:57 UTC some sql queries are timing out, on the postgres app “Monitoring” section this is what I see:
fra [error] Error: timed out while connecting to app

It’s more than 2 weeks that I’m using the same fly apps setup and code, this is the first time that I see timeout errors, anyone has any clue?