pm2 restart command ignores saved `windowsHide` process setting

What's going wrong?

If starting a process with an ecosystem file that has windowsHide set to false, restarting that process via pm2 restart <name> restarts the process with windowsHide set to true.

If the master pm2 process restarts from scratch and loads a saved process that has windowsHide set to false, the setting works as expected.

How could we reproduce this issue?

Start a new process with windowsHide set to false, confirming the window is showing. Restart the process with pm2 restart <name>, and confirm the window is now hidden. The process's env has windowsHide set to true, which you can confirm with a tool like Process Explorer.

Supporting information

My ecosystem file:

module.exports = {
  apps : [{
    name: 'sync',
    script: 'Sync.exe',
    instances: 1,
    autorestart: true,
    windowsHide: false,
    watch: false,
    max_memory_restart: '1G'
  }]
};

--- PM2 report ----------------------------------------------------------------
Date                 : Fri Dec 13 2019 10:37:44 GMT-0500 (Eastern Standard Time)
===============================================================================
--- Daemon -------------------------------------------------
pm2d version         : 4.1.2
node version         : 10.17.0
node path            : not found
argv                 : C:\Program Files\nodejs\node.exe,C:\Users\Administrator\AppData\Roaming\npm\node_modules\pm2\lib\Daemon.js
argv0                : node
user                 : undefined
uid                  : N/A
gid                  : N/A
uptime               : 9min
===============================================================================
--- CLI ----------------------------------------------------
local pm2            : 4.1.2
node version         : 10.17.0
node path            : not found
argv                 : C:\Program Files\nodejs\node.exe,C:\Users\Administrator\AppData\Roaming\npm\node_modules\pm2\bin\pm2,report
argv0                : node
user                 : Administrator
===============================================================================
--- System info --------------------------------------------
arch                 : x64
platform             : win32
type                 : Windows_NT
cpus                 : Intel(R) Core(TM) i7-8700T CPU @ 2.40GHz
cpus nb              : 12
freemem              : 30745886720
totalmem             : 34190544896
home                 : C:\Users\Administrator
===============================================================================
--- PM2 list -----------------------------------------------
┌────┬─────────────────────────┬─────────┬─────────┬──────────┬────────┬──────┬──────────┬──────────┬──────────┬──────────┬──────────┐
│ id │ name                    │ version │ mode    │ pid      │ uptime │ ↺    │ status   │ cpu      │ mem      │ user     │ watching │
├────┼─────────────────────────┼─────────┼─────────┼──────────┼────────┼──────┼──────────┼──────────┼──────────┼──────────┼──────────┤
│ 2  │ sync                    │ N/A     │ fork    │ 11060    │ 9m     │ 0    │ online   │ 0%       │ 74.1mb   │ Adm… │ disabled │
└────┴─────────────────────────┴─────────┴─────────┴──────────┴────────┴──────┴──────────┴──────────┴──────────┴──────────┴──────────┘
===============================================================================
--- Daemon logs --------------------------------------------
C:\Users\Administrator\.pm2\pm2.log last 20 lines:
PM2        | 2019-12-13T10:28:33: PM2 log: Time                 : Fri Dec 13 2019 10:28:33 GMT-0500 (Eastern Standard Time)
PM2        | 2019-12-13T10:28:33: PM2 log: PM2 version          : 4.1.2
PM2        | 2019-12-13T10:28:33: PM2 log: Node.js version      : 10.17.0
PM2        | 2019-12-13T10:28:33: PM2 log: Current arch         : x64
PM2        | 2019-12-13T10:28:33: PM2 log: PM2 home             : C:\Users\Administrator\.pm2
PM2        | 2019-12-13T10:28:33: PM2 log: PM2 PID file         : C:\Users\Administrator\.pm2\pm2.pid
PM2        | 2019-12-13T10:28:33: PM2 log: RPC socket file      : \\.\pipe\rpc.sock
PM2        | 2019-12-13T10:28:33: PM2 log: BUS socket file      : \\.\pipe\pub.sock
PM2        | 2019-12-13T10:28:33: PM2 log: Application log path : C:\Users\Administrator\.pm2\logs
PM2        | 2019-12-13T10:28:33: PM2 log: Process dump file    : C:\Users\Administrator\.pm2\dump.pm2
PM2        | 2019-12-13T10:28:33: PM2 log: Concurrent actions   : 2
PM2        | 2019-12-13T10:28:33: PM2 log: SIGTERM timeout      : 1600
PM2        | 2019-12-13T10:28:33: PM2 log: ===============================================================================
PM2        | 2019-12-13T10:28:34: PM2 log: App [sync:2] starting in -fork mode-
PM2        | 2019-12-13T10:28:34: PM2 log: App [sync:2] online

Start by tracing how pm2 restart <name> reconstructs a process from its saved ecosystem configuration, focusing on where windowsHide is applied. Reproduce the Windows case with windowsHide: false, then verify that restarting preserves the setting and that a saved-process reload still behaves consistently.