[stutter~] not sending "dirty" (MSP SDK) message to an assigned external buffer?

Here is a patch to demonstrate the issue:

If you check the waveform~, it does not update the graphics upon stutter~ capture.

EDIT: As well as the buffer window itself, if it is open while capturing

Is it just me? Max 5.1.7, latest Snow Leopard MBP...

Panos