PHP - Xdebug Installation And Use

Hi y'all.

I've been scrubbing Google for this and from everything I'm reading and seeing, this should be working - problem is it's not... Here's the deal. I've got a docker image spun up with my development environment and all that's fine. I've updated the php.ini on the image with the following:

[xdebug]
xdebug.remote_autostart=1
xdebug.remote_enable=1
xdebug.remote_log="/var/log/xdebug.log"
xdebug.remote_host=host.docker.internal
xdebug.remote_handler=dbgp
xdebug.remote_port=9000
xdebug.remote_connect_back=0
xdebug.collect_vars=1
xdebug.collect_returns=1
xdebug.collect_assignments=1
xdebug.profiler_enable=1
xdebug.idekey=VSCODE

I created a new config in launch.json as so:

{
  "name": "Remote XDebug",
  "type": "php",
  "request": "launch",
  "port": 9900,
  "pathMappings": {
    "/var/www/html" : "${workspaceRoot}/myDir"
  },
  "cwd": "${workspaceRoot}/myDir"
}

I set a few breakpoints in VSCode in my file on the host system, start the debugger, and docker-compose run into the image, where I `php test.php` and expect to be brought into the debug session as I would on the host system (that part works). However, it doesn't happen - I never get into the debug session on the host system. My xdebug.log does, however, look like everything should be working:

[11] Log opened at 2020-05-04 20:37:03
[11] I: Connecting to configured address/port: host.docker.internal:9000.
[11] I: Connected to client. :-)
[11] -> <init xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" fileuri="file:///var/www/html/testing/test.php" language="PHP" xdebug:language_version="7.1.33" protocol_version="1.0" appid="11" idekey="VSCODE"><engine version="2.9.1"><![CDATA[Xdebug]]></engine><author><![CDATA[Derick Rethans]]></author><url><![CDATA[https://xdebug.org]]></url><copyright><![CDATA[Copyright (c) 2002-2020 by Derick Rethans]]></copyright></init>
[11] -> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="https://xdebug.org/dbgp/xdebug" status="stopping" reason="ok"></response>
[11] Log closed at 2020-05-04 20:37:03

Oh, and my docker-compose file maps port 9900 on the host to 9000 image.

service:
  build:
  context: '.'
  volumes:
    - ../myDir/:/var/www/html/
    - ../logs/:/var/log/
  ports:
    - 80:80
    - 443:443
    - 9900:9000
  networks:
    - test
  environment:
    - ENVIRONMENT=development
  depends_on:
    - database

Anybody have any ideas? I'm just burning time on this now, but I'd very much like to be able to debug in the docker container because I'm currently working with a couple different companies that use wildly different php/server setups and I don't want to have to try and keep that straight or have to continually nuke my machine.

Thanks in advance!