Switching to Railway.app literally solved all my problems in minutes.
Also, it’s promising to be cheaper than Render. So that’s a bonus. And Render had a history of random outages in the Frankfurt region that weren’t logged properly in the status dashboard. Incident reports were missing or said services were down for a few minutes, when it was hours instead. So maybe the Render problems are a sign to abandon and move. I’m kinda sad to be leaving Render, I loved being able to choose which region my data lives in.