[BUG] Multiple hot masters configuration does not work as expected

Description
When configuring a minion in a redundant master setup, where all masters are "hot", the job returns are only sent to the master that issued the command, rather than all.

Setup
Install salt-master on two separate machines. Copy the master.pem and master.pub from one machine to the other so that they have the same keys.

Install salt-minion on a separate machine and configure as follows

master:
  - <salt-master-0-ip>
  - <salt-master-1-ip>

master_type: str

Where <salt-master-0-ip> and <salt-master-1-ip> are the master's ip addresses, respectively.

Steps to Reproduce the behavior
Run a job from salt-master-0

salt \* test.ping --async

Observe the return using a runner

salt-run jobs.lookup_jid <jid>

Where <jid> is the jid returned from the prior command

Observe that you cannot see return from other master

salt-run jobs.lookup_jid <jid>

Expected behavior

I expected the job data to be returned to both masters since they are configured as "hot-hot". Not returning jobs to both masters reduces the utility of this configuration

Versions Report

Salt Version:
          Salt: 3003.2

Dependency Versions:
          cffi: Not Installed
      cherrypy: Not Installed
      dateutil: Not Installed
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 2.11.1
       libgit2: Not Installed
      M2Crypto: 0.35.2
          Mako: Not Installed
       msgpack: 0.6.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: Not Installed
      pycrypto: Not Installed
  pycryptodome: Not Installed
        pygit2: Not Installed
        Python: 3.6.8 (default, Nov 16 2020, 16:55:22)
  python-gnupg: Not Installed
        PyYAML: 3.13
         PyZMQ: 17.0.0
         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: 3.10.0-1127.el7.x86_64
        system: Linux
       version: CentOS Linux 7 Core