The node Memory (Debug) will only write to the console if a GDI renderer is hooked to its output, and that renderer is visible (not Alt-3) and enabled.
The numeric outputs work all the time, it’s just that banging the “Log” input pin will have no effect without a renderer attached. Methinks the code for generating the output strings is incorrectly placed in the GDI generation section…
Interestingly the console output will still appear even if the “Show Data” pin is false as long as a renderer is still attached and enabled.