My logs:
2023/02/12 20:38:46.122618 #b connected ...
2023/02/12 20:41:51.409673 #c connected ...
2023/02/12 20:44:01.227204 #d connected ...
2023/02/12 20:45:44.665366 #e connected ...
2023/02/12 20:46:20.129083 #f connected ...
2023/02/12 20:47:37.790549 #10 connected ...
2023/02/12 20:48:07.570915 #11 connected ...
2023/02/12 20:50:05.185822 #12 connected ...
I got here from Fly-Builder can't connect to Docker because my flyctl deploy command was hanging, so I tried to restart the agent, which – like for @ignoramous – hangs for me. doctor also hangs while Testing flyctl agent...