Proxy Minion does not return schedule result

[TheBirdsNest]

Description
I believe this is related to issue #39668 which was closed in 2017.
When implementing a schedule with a Salt Proxy Minion, the result of the scheduled task is not returned to the master or to the Event Bus.

Setup
x1 Salt Master running on a Cloud VM with 8GB RAM and 4 vCPU's
x5 Syndic Masters running on a Cloud VM with 256GB RAM and 64 vCPU's serving 1500 proxy minions each.

Steps to Reproduce the behavior
Create a schedule that targets a proxy minion:

c73b4f53-2528-4ff9-af51-82837bfd18e2:
    schedule:
      enabled: true
      example:
        cron: 0 * * * *
        enabled: true
        function: test.ping
        name: example
      switchport_utilization:
        cron: 0 10,14 * * 1-5
        enabled: true
        function: interface.utilization_summary
        name: switchport_utilization
        splay: 1800

Wait for the job to be executed. Below is the output from the proxy debug:

[DEBUG   ] LazyLoaded interface.utilization_summary
[DEBUG   ] LazyLoaded test.ping
[DEBUG   ] LazyLoaded mine.update
[DEBUG   ] Subprocess Thread-263-Schedule-__proxy_keepalive cleaned up
[DEBUG   ] schedule: Job __proxy_keepalive was scheduled with jid_include, adding to cache (jid_include defaults to True)
[DEBUG   ] schedule: Job __proxy_keepalive was scheduled with a max number of 1
[INFO    ] Running scheduled job: __proxy_keepalive with jid 20221101172955648942
[DEBUG   ] Subprocess Thread-264-Schedule-__proxy_keepalive added
[DEBUG   ] Using importlib_metadata to load entry points
[DEBUG   ] LazyLoaded status.proxy_reconnect
[DEBUG   ] schedule.handle_func: adding this job to the jobcache with data {'id': 'c73b4f53-2528-4ff9-af51-82837bfd18e2', 'fun': 'status.proxy_reconnect', 'fun_args': [{'proxy_name': 'napalm'}], 'schedule': '__proxy_keepalive', 'jid': '20221101172955648942', 'pid': 11939}
[DEBUG   ] schedule.handle_func: Removing /var/cache/salt/proxy/c73b4f53-2528-4ff9-af51-82837bfd18e2/proc/20221101172955648942
[DEBUG   ] LazyLoaded interface.utilization_summary
[DEBUG   ] LazyLoaded test.ping
[DEBUG   ] LazyLoaded mine.update
[DEBUG   ] Subprocess Thread-264-Schedule-__proxy_keepalive cleaned up

Check the Event Bus.. There is no event for __schedule_return:

20221101173104365994    {
    "_stamp": "2022-11-01T17:31:04.366385",
    "minions": [
        "c73b4f53-2528-4ff9-af51-82837bfd18e2"
    ]
}
salt/job/20221101173104365994/new       {
    "_stamp": "2022-11-01T17:31:04.367102",
    "arg": [],
    "fun": "schedule.list",
    "jid": "20221101173104365994",
    "minions": [
        "c73b4f53-2528-4ff9-af51-82837bfd18e2"
    ],
    "missing": [],
    "tgt": "*",
    "tgt_type": "glob",
    "user": "root"
}
salt/stats/MWorker-3    {
    "_stamp": "2022-11-01T17:31:04.372164",
    "stats": {
        "publish": {
            "mean": 0.006384372711181641,
            "runs": 1
        }
    },
    "time": 1014.6155388355255,
    "worker": "MWorker-3"
}
salt/job/20221101173104365994/ret/c73b4f53-2528-4ff9-af51-82837bfd18e2 {
    "_stamp": "2022-11-01T17:31:04.448417",
    "cmd": "_return",
    "fun": "schedule.list",
    "fun_args": [],
    "id": "c73b4f53-2528-4ff9-af51-82837bfd18e2",
    "jid": "20221101173104365994",
    "retcode": 0,
    "return": "schedule:\n  enabled: true\n  example:\n    cron: 0 * * * *\n    enabled: true\n    function: test.ping\n    name: example\n  switchport_utilization:\n    cron: 0 10,14 * * 1-5\n    enabled: true\n    function: interface.utilization_summary\n    name: switchport_utilization\n    splay: 1800\n",
    "success": true
}
salt/stats/MWorker-0    {
    "_stamp": "2022-11-01T17:31:04.450653",
    "stats": {
        "_return": {
            "mean": 0.002768278121948242,
            "runs": 1
        }
    },
    "time": 1012.1096804141998,
    "worker": "MWorker-0"
}

Check the Job Cache.. There are no jobs for the schedule:

20221101171415775118:
    ----------
    Arguments:
    Function:
        schedule.list
    StartTime:
        2022, Nov 01 17:14:15.775118
    Target:
        *
    Target-type:
        glob
    User:
        root
20221101173104365994:
    ----------
    Arguments:
    Function:
        schedule.list
    StartTime:
        2022, Nov 01 17:31:04.365994
    Target:
        *
    Target-type:
        glob
    User:
        root

Expected behavior
Once a scheduled job is executed, the return is published on the event bus and is exposed to the master.

Versions Report
Salt Version:
Salt: 3005

Dependency Versions:
cffi: 1.14.4
cherrypy: 5.6.0
dateutil: 2.8.1
docker-py: 4.4.4
gitdb: Not Installed
gitpython: Not Installed
Jinja2: 3.0.2
libgit2: Not Installed
M2Crypto: 0.35.2
Mako: Not Installed
msgpack: 0.6.2
msgpack-pure: Not Installed
mysql-python: Not Installed
pycparser: 2.20
pycrypto: 2.6.1
pycryptodome: 3.9.9
pygit2: Not Installed
Python: 3.6.8 (default, Nov 16 2020, 16:55:22)
python-gnupg: Not Installed
PyYAML: 5.3.1
PyZMQ: 18.0.1
smmap: Not Installed
timelib: Not Installed
Tornado: 4.5.3
ZMQ: 4.1.4

System Versions:
dist: centos 7 Core
locale: UTF-8
machine: x86_64
release: 3.10.0-1160.76.1.el7.x86_64
system: Linux
version: CentOS Linux 7 Core