They've been trialing different things. For awhile the comments were "under review" then it changed to something coming up saying didn't meet the guildlines, then they changed it to "something went wrong" instead of letting you know it didn't meet guidelines and was under review. Now the newest thing is that it you will simply just literally not be able to post the comment at all. It will just sit there. This newer thing is even more aggravating. No doubt they changed it to that in the hopes that there will be less complaining that there was with "under review " and "something went wrong But no this is even more irritating. You can just push the button forever now and the comment doesn't go through but there is no comment.
Interesting that this help forum was coded differently and here the only two words that the bots seem to forbit are the names of the current president of the USA and of the former president of the USA.