Heh, I had a health insurance portal that when you changed your password with their mobile app, it would let you use all the special characters. However the web app blocked (or stripped) those characters out, meaning you couldn't log in to the web app because it literally wouldn't let you type your password. Every so often the mobile app forced re-auth, and it redirected you to the web version where putting in your password wouldn't work... I likewise had a nightmare process to get it reset.
Yes, I really dislike those companies that spend so much effort blocking pasting into the second password field when filling them out so they break password managers.
Luckily it's normally easy enough to edit the tags on the text box but even so, this shouldn't be necessary.