`fly postgres create` is unresponsive and hangs

$ fly version
  fly v0.0.429 darwin/arm64 Commit: 6db701e0 BuildDate: 2022-11-04T13:45:42Z

I’m creating a managed Postgres instance, and am running the command below:

fly postgres create --region sin \
  --name foo \
  --vm-size shared-cpu-1x \
  --volume-size 1 \
  --initial-cluster-size 1

This does not complete, and eventually hangs.
The immediate output before hanging is:

automatically selected personal organization: <my name>
Creating postgres cluster in organization personal
Creating app...
Setting secrets on app foo..Provisioning 1 of 1 machines with image flyio/postgres:14.4

After a ^C, I can see that the DB is created as the corresponding app is now listed on my Fly.io dashboard, but I don’t get a chance to see the values of the secrets associated with the database, so I can’t verify connectivity.

I tried destroying that and recreating with LOG_LEVEL=debug, and the final request made before a hang is:

DEBUG --> POST http://[fdaa:0:b744::3]:4280/v1/apps/foo/machines

{
  "appId": "foo",
  ...
}
DEBUG {0x140011bdb00}

I remember that this was working great in v0.0.427 when I was using it a few weeks ago, so I’m not sure if something’s changed with how it’s used now, or if something is legitimately broken in the system at this time.