Email alert notification different between 2 prometheus jobs

General Help/Support
1

I have some config Prometheus, Alert rules same format
Prometheus jobs (same format)

 - job_name: "windows"
    file_sd_configs:
      - files:
        - windows.yml
    relabel_configs:
        - source_labels: [__address__]
          target_label: host
          regex: ^(.*):\d+$
#          target_label: address
          replacement: $1

  - job_name: "linux"
    file_sd_configs:
      - files:
        - linux.yml
    relabel_configs:
        - source_labels: [__address__]
          target_label: host
          regex: ^(.*):\d+$
#          target_label: address
          replacement: $1

windows.yml

- labels:
    job: "windows"
    system: "windows01"
  targets:
  - "abc.def.ghi.xyz:9182"

linuxs.yml

- labels:
    job: "linux"
    system: "linux01"
  targets:
  - "abc.def.ghi.xyz:9100"

windows.rule

  - alert: WindowsServerCpuUsage
    expr: 100 - (avg by (instance) (rate(windows_cpu_time_total{mode="idle"}[2m])) * 100) > 95
    for: 2m
    labels:
      severity: warning
    annotations:
      summary: high CPU load
      description:  (System {{ $labels.system }})(instance {{ $labels.instance }}) CPU load was > 95% for more than 2m\n  VALUE = {{ $value }}\n

linux.rule

 - alert: LinuxServerMemoryUsage
    expr: 100 - ((node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100) > 95
    for: 2m
    labels:
      severity: warning
    annotations:
      summary: high Memory usage
      description:  (System {{ $labels.system }})(instance {{ $labels.instance }}) Memory usage was > 95% for more than 2m\n  VALUE = {{ $value }}\n

But when I received email alert, content of Linux have more labels than Windows, I using same email template

Linux email content:

Labels
alertname = LinuxServerMemoryUsage
env = prod
host = abc.def.ghi.xyz
instance = abc.def.ghi.xyz:9100
job = linux
monitor = Myl-Infras
severity = warning
system = linux01
Annotations
description = (System linux01)(instance abc.def.ghi.xyz:9100) Memory usage was > 95% for more than 2m\n VALUE = 95.4328275548093\n
summary = high Memory usage
Source

Windows email content

Labels
alertname = WindowsServerMemoryUsage
instance = abc.def.ghi.xyz:9182
monitor = My-Infras
severity = warning
Annotations
description = (System )(instance abc.def.ghi.xyz:9182) Memory usage was > 95% for more than 2m\n VALUE = 95.4328275548093\n
summary = high Memory usage
Source

Why my email Windows missing some lables like: env; host, job; system when all my config as same format. I need include label “System” in my email beside host IP Address (my Infra have many server and I can not remember all IP of them).