It’s probably not the power either. I have tried with both the 40W adapter I received with the kit, as well as the 60W I got as a replacement to see if it fixed the issues.
The Pi starts booting, but never completes, possibly going into emergency mode. The screen activates, but it doesn’t show an IP. The disk LEDs are lit up. But it doesn’t start up any services like ssh.
Without the case, it boots up fine. So while I haven’t tried with another SD card, I don’t see how that could be the problem. I have tried with another Pi4, and it was the same issue.