@pollux We’re talking about two different issues here. In your case, it may be that Redis timeouts were indirectly causing your app HTTP requests to time out. In the case of @freeezefive, Redis was not in play.
There’s another thread discussing what may be related to the problem you’re seeing: Upstash Redis and "could not send HTTP request to instance: connection error: timed out" logs - #4 by jsierles.