Hi @John Anastasio I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to accept the answer .
Issue:
The bing maps api pushpin colors stopped working
Solution:
The older version of the JavaScript no longer works and paths/reference were changed and or removed. You will need to download the latest if you are hosting the source locally because of the lack of integrity tags with the CDN.
If I missed anything please let me know and I'd be happy to add it to my answer, or feel free to comment below with any additional information.
I hope this helps!
If you have any other questions, please let me know. Thank you again for your time and patience throughout this issue.