This is a well known problem that Roland refuses to acknowledge.
After I bought the xp I had 30 days to return it, so I gave Roland the benefit of the doubt, hoping they would acknowledge the problem and repair it.
Not only did they pretend it didn't exist, but the customer service was totally rude.
I was very polite with Roland customer service, I don't know what their deal was.
I asked If could speak with the manager, and the guy on the phone told me " no, because it's December".
I then told him that several other people online had discussed this issue. He told me " people on the internet are stupid".
Needless to say, I took the xp-60 back and got store credit. A played around with some synths for awhile, and took a Korg Triton home two weeks later.