I’m in the MIDI Fighter Twister Beta Category but cannot submit feedback because there is no “New Post” button. Maybe my user level needs to be increased to post there.
I know you found the button and were able to post so just replying in case anyone else encounters a similar issue later on.
In order to open a new topic you have to be at the category/subcategory home, not on a thread. In the case of the Beta it’s over here