There's about a 70% chance you found a glitch. The "pink panels" are supposed to indicate that a post contains language or material that is not permitted. However, they may also be triggered by a glitch in the forum software. The latter seems more common lately.
When I get "pinked," I copy what I wrote to the clipboard, refresh the page, paste the previous text, then try again. If it goes through on the second attempt, it was a glitch.
If it continues to go pink, you have included something forbidden, and it will repeat ad nauseum.
So "try again" is your best first step.
As other end users, that's all we can offer. We have only observational experience with these forums, not control or "under-the hood access.
Ifyou want to contact someone on the moderation team, their email address is in the Terms of Use document you agreed to follow when you signed up here:
Apple Support Community Terms of Use