nomad alloc logs -f not stopping after exit 0 ?

Nomad v1.10.4
BuildDate 2025-08-12T20:48:32Z
Revision 62b195aaa535b2159d215eaf89e6f4a455d6f686

Nomad v1.9.7
BuildDate 2025-03-11T09:07:15Z
Revision f8695974efdbaa9f80ace06f0eec5bd4d2501035+CHANGES

cat << EOF > nomad-hello-world.hcl
job "helloworld" {
  datacenters = ["*"]
  type = "batch"
  group "example" {
    task "alpine" {
      driver = "docker"
      config {
        image = "alpine"
        args = [
          "echo",
          "hello_world",
        ]
      }
    }
  }
}
EOF

nomad job plan nomad-hello-world.hcl
nomad job run -check-index 0 nomad-hello-world.hcl

export MAX_TRIES=20 TRY=0 ALLOC_ID=""

#loop until alloc done downloading image.
while [[ -z "$ALLOC_ID" && $TRY -lt $MAX_TRIES ]]; do
  ALLOC_ID=$(nomad job status helloworld | awk '/run.*(running|complete).*ago/ {getline; print $1}')
  if [[ -z "$ALLOC_ID" ]]; then
    sleep 2
    ((TRY++))
    echo "Waiting... ($TRY/$MAX_TRIES)"
  fi
done

#show alloc status -short
nomad alloc status -short $ALLOC_ID

#echo hello_world should be quick, timeout with 60 seconds.
timeout 60 nomad alloc logs -f $ALLOC_ID

ALLOC_EXITCODE=$?
if test $ALLOC_EXITCODE -eq 0
then 
    echo "ALLOC_EXITCODE:$ALLOC_EXITCODE = OK -> PASS .. logs -f terminated properly"
else
    nomad alloc status $ALLOC_ID
    echo "ERROR ALLOC_EXITCODE=$ALLOC_EXITCODE timeout reached, logs -f was not closing after task dead/terminated/exit (0)"
fi

+ Job: "helloworld"
+ Task Group: "example" (1 create)
  + Task: "alpine" (forces create)

Scheduler dry-run:
- All tasks successfully allocated.

Job Modify Index: 0
To submit the job with version verification run:

nomad job run -check-index 0 nomad-hello-world.hcl

When running the job with the check-index flag, the job will only be run if the
job modify index given matches the server-side version. If the index has
changed, another user has modified the job and the plan's results are
potentially invalid.


==> View this job in the Web UI: https://nomad-stagingmyinternal-domain.com/ui/jobs/helloworld@default

==> 2025-09-04T09:25:59+08:00: Monitoring evaluation "97ec7bc6"
    2025-09-04T09:25:59+08:00: Evaluation triggered by job "helloworld"
    2025-09-04T09:26:00+08:00: Allocation "5c78ab54" created: node "03e2e1fc", group "example"
    2025-09-04T09:26:00+08:00: Evaluation status changed: "pending" -> "complete"
==> 2025-09-04T09:26:00+08:00: Evaluation "97ec7bc6" finished with status "complete"


==> View job details and metrics in the Web UI: https://nomad-stagingmyinternal-domain.com/ui/jobs/helloworld@default
Error querying allocation: Unexpected response code: 500 (alloc lookup failed: index error: Invalid UUID: encoding/hex: invalid byte: U+0068 'h')
Waiting... (1/20)


==> View job details and metrics in the Web UI: https://nomad-staging.myinternal-domain.com/ui/jobs/helloworld@default
ID       = 5c78ab54-40d2-8191-3e3e-b5d71c736719
Name     = helloworld.example[0]
Created  = 4s ago
Modified = 2s ago

Tasks
Name    State  Last Event  Time                       Lifecycle
alpine  dead   Terminated  2025-09-04T09:26:00+08:00  main


==> View allocation details in the Web UI: https://nomad-staging.myinternal-domain.com/ui/allocations/5c78ab54-40d2-8191-3e3e-b5d71c736719
hello_world
ID                  = 5c78ab54-40d2-8191-3e3e-b5d71c736719
Eval ID             = 97ec7bc6
Name                = helloworld.example[0]
Node ID             = 03e2e1fc
Node Name           = nomad-staging-node1
Job ID              = helloworld
Job Version         = 0
Client Status       = complete
Client Description  = All tasks have completed
Desired Status      = run
Desired Description = <none>
Created             = 1m4s ago
Modified            = 1m2s ago

Task "alpine" is "dead"
Task Resources:
CPU      Memory   Disk     Addresses
100 MHz  300 MiB  300 MiB  

Task Events:
Started At     = 2025-09-04T01:26:00Z
Finished At    = 2025-09-04T01:26:00Z
Total Restarts = 0
Last Restart   = N/A

Recent Events:
Time                       Type        Description
2025-09-04T09:26:00+08:00  Terminated  Exit Code: 0
2025-09-04T09:26:00+08:00  Started     Task started by client
2025-09-04T09:25:59+08:00  Driver      Downloading image
2025-09-04T09:25:59+08:00  Task Setup  Building Task Directory
2025-09-04T09:25:59+08:00  Received    Task received by client


==> View allocation details in the Web UI: https://nomad-staging.myinternal-domain.com/ui/allocations/5c78ab54-40d2-8191-3e3e-b5d71c736719
ERROR ALLOC_EXITCODE=124 timeout reached, logs -f was not closing after task dead/terminated/exit (0)

job "helloworld" {
  datacenters = ["*"]
  type = "batch"
  group "example" {
    task "alpine" {
      driver = "docker"
      config {
        image = "alpine"
        args = [
          "echo",
          "hello_world",
        ]
      }
    }
  }
}