Spit Balling:
Maybe a cookie blocker on your Computer?
....or Browser issue? The Brave browser has been known to block all kinds of things that feed into TTX, until folks tun off that browser's high security or firewall settings.
....or a high security setting on whatever browser you are using that doesn't hold/keep the cookie, or whatever background code is needed such that the discount is applied?
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
