Why is ChatGPT Pro temporarily limited on my account?

I’m honestly furious. For the price of ChatGPT Pro, it is disgraceful that Pro / research-grade intelligence can suddenly be greyed out with a vague “temporarily limited” message, and support gives generic troubleshooting crap instead of a clear account review. This looks account-side and paying customers should not be left wasting hours or days trying to guess what OpenAI has restricted and why!. Something needs to be done right now.