Unsure if this is a bug for 1.5.2, but I never noticed this behavior before the update.
The program select buttons on my P5 are not working every time. It's not a single button that is the issue, but all 8 of them, so it's not just a faulty switch. You'll hear the mechanical click, but the program won't change, sometimes it takes 3-4 clicks before it takes. This happens consistently on all 8 buttons.