I submitted a review of a Candlewood that said it was a nice hotel with great staff, and the only problem I had was the bedbugs.
That one got blocked too, with this email:
Your review has been rejected.
As a valued guest, your concerns are of the utmost priority. Therefore, rather than posting your review, we have alerted our Customer Care Team. One of our agents will be reaching out to you immediately. We apologize for the experience you had at our hotel, and thank you for bringing it to our attention.
I haven't done a review on the IHG site since.