Bernie, is there any mention of a bug like this on the Korg forums? The PA4X isn't "new" and there are a LOT of users. Also the OS is pretty similar to the Pa900, Pa700, etc. so if PA4X has a "bug" about this the others probably do too.

The Korg Forums have a lot of users. For some, English as their second language but I've often found useful info there.