Thanks @lubien for taking the time.
Now I run exactly the same command over and over, and get no error message. So for the time being I seem to be OK but it feels shaky.
PS. I am using the wifi of The Swedish Internet Foundation (top level domain provider) so I hope any connectivity problem is not in this building 
❯ LOG_LEVEL=debug flyctl machines list --app klimsek-update-pocketbase-js-sdk-112 --quiet
DEBUG Loaded flyctl config from/home/einar/.fly/config.yml
DEBUG determined hostname: "x13"
DEBUG determined working directory: "/home/einar/Projects/****REDACTED***"
DEBUG determined user home directory: "/home/einar"
DEBUG determined config directory: "/home/einar/.fly"
DEBUG ensured config directory exists.
DEBUG ensured config directory perms.
DEBUG cache loaded.
DEBUG config initialized.
DEBUG skipped querying for new release
DEBUG client initialized.
DEBUG no app config found at /home/einar/Projects/****REDACTED***fly.toml; skipped.
DEBUG --> GET https://api.machines.dev/v1/apps/klimsek-update-pocketbase-js-sdk-112/machines
DEBUG Starting task manager
DEBUG Config has metrics token
DEBUG <-- 200 https://api.machines.dev/v1/apps/klimsek-update-pocketbase-js-sdk-112/machines (64.86ms)
DEBUG [
{
"id": "5683d52ea17228",
"name": "little-sound-3091",
"state": "started",
"region": "fra",
"instance_id": "01H90JK5QVQMY3TN8D8HK6QZQ6",
"private_ip": "fdaa:1:358e:a7b:1c2:f8c8:5035:2",
"config": {
"env": {
"FLY_PROCESS_GROUP": "app",
"PRIMARY_REGION": "fra"
},
"init": {},
"metadata": {
"fly_flyctl_version": "0.1.84",
"fly_platform_version": "v2",
"fly_process_group": "app",
"fly_release_id": "P5jgApLBB04j3Tyn6kBbe9M1X",
"fly_release_version": "2"
},
"services": [
{
"protocol": "tcp",
"internal_port": 8080,
"ports": [
{
"port": 80,
"handlers": [
"http"
],
"force_https": true
},
{
"port": 443,
"handlers": [
"tls",
"http"
]
}
],
"checks": [
{
"type": "tcp",
"interval": "15s",
"timeout": "2s",
"grace_period": "1s"
}
],
"concurrency": {
"type": "connections",
"hard_limit": 20,
"soft_limit": 15
},
"force_instance_key": null
}
],
"image": "registry.fly.io/klimsek-update-pocketbase-js-sdk-112:deployment-01H90JJJN5FHWQA1PFGBD6TVD6",
"restart": {},
"guest": {
"cpu_kind": "shared",
"cpus": 1,
"memory_mb": 256
},
"stop_config": {
"signal": "SIGINT"
}
},
"image_ref": {
"registry": "registry.fly.io",
"repository": "klimsek-update-pocketbase-js-sdk-112",
"tag": "deployment-01H90JJJN5FHWQA1PFGBD6TVD6",
"digest": "sha256:08156019f9dfd65a6c95b330f481fde5fd75a40af676483cd8abfdee3a481c08",
"labels": null
},
"created_at": "2023-08-28T14:32:42Z",
"updated_at": "2023-08-29T11:59:29Z",
"events": [
{
"id": "01H90JKFTN17BXTAVRC2SFKJDB",
"type": "start",
"status": "started",
"source": "flyd",
"timestamp": 1693310369621
},
{
"id": "01H90JK5QZ2HH6NDRM4VP072T5",
"type": "launch",
"status": "created",
"source": "user",
"timestamp": 1693310359295
}
],
"checks": [
{
"name": "servicecheck-00-tcp-8080",
"status": "passing",
"output": "Success",
"updated_at": "2023-08-28T14:32:58.931Z"
}
]
}
]
5683d52ea17228
DEBUG Task manager done
