This doesn't happen every time but I've had it occur between 5-10 times. The screenshots are from the most up to date beta version and show two seperate occasions where it happened recently, the first on the 23rd of October and the second on the 29th of October. Whenever I have media playing and scroll down twice to access the quick panel icons, what will happen is the first page will only show the top 4 icons and cut off the bottom 4 icons then if I scroll across to the adjacent icon panels it is blank with no access to any icons. Usually happens when I have bluetooth headphones connected in addition to using Apple Music or Spotify but could also be occurring during unrelated scenarios with no Bluetooth headphones connected or with different media apps playing I don't remember.
After these were taken I removed some Good Home customisations related to the notification area which were still applied since the switch and I'll report back down the line if that was the issue.