A bug of the HP-15C Collector's Edition running in HP-16C mode?

[rjwalker]

(Continuing with the HP-15C CE in HP-16C mode ...)

I'm working through the HP-16C manual and trying everything out. On page 20 there are instructions for "Resetting Continuous Memory" using a combination of the "ON" and "-" keys:

1. Turn the calculator off.
2. Press and hold "ON", then press and hold "-".
3. Release "ON", then "-".
   

This doesn't seem to work for me; it's equivalent just to pressing "ON" then "-" in sequence. It doesn't reset the base to HEX, or clear the stack or the program memory.

Not a problem per se, as there are other ways to do a reset (e.g., switch to HP-15C mode and back again).

I then tried the key sequence in reverse: with the calculator off, press and hold "-", then press "ON". Uh-oh. The calculator stays off, and won't come on despite repeated presses of the "ON" key. I had to open the back and press the RESET button.