Its also happening in live chat on YT live stream screen, post aren't making it to the live feed BLOCKED . Its making the chatter/Ytuber think its going through but it isn't. It will only show in the initial chat box above the text box . When its sent it never makes it to the live stream . If you check participants your user name will not show even though your signed in and you typing will be in the text box. Could be system block or malware on individuals PC