Can't answer phone

[FormerPalmOS]

I have a strange problem with the stock OEM pack for VZW CDMA Touch Pro. Sometimes (still trying to make this be repeatable) when an incoming call arrives, I am unable to answer the phone via any means. Can't answer on BT headset, can't tap answer key on screen, can't press hard answer button. THe phone ignores all of the above.

I am trying a new SYS (21015) as of this morning for other reasons - not sure if this will fix it but I suspect the problem is with the OEM pack, not the OS - and I'm trying with the sliding pickup option in phone settings enabled. Will report if any of the above change the problem.

I nearly always have Bluetooth on, though not always with a connected hands-free device (though it doesn't seem to matter if there is a device connected or not - I can't answer the phone when this happens with the hands-free answer button either).

Soft reset always makes the problem go away though it returns eventually.

Any thoughts?