[Discuss-gnuradio] Multiply block problem in GRC 3.6.5.1

[Winderson Luiz Franzoi Speranzini]

Hello GRC community,
I'm initiating with grc, trying to make a simple BASK. I searched a lot in the mailing list and
in the tracker (I don't know if it's called that way) but I was unable to find anything about.
It's a simple problem (maybe due my GRC version) that does not ruin my projects at all.
When I use the multiply block, inputing a cossine(12kHz) and a rectangular(1kHz) wave from the signal
generator block, I don't get the nice BASK that we should (Viewed from a wx osciloscope).
Instead, the cossine change the amplitude in the middle 3 cycles and last longer 3 other cycles than it should.
The fact is that it just happen when I use complex outputs and inputs. Both the I and Q wave have
the same style. When I use real inputs, or if I separete the real and imag part, multiply they separately and
then put together in a complex signal, it works like it should be. Maybe it can be an old and corrected bug
Sorry for my bad english.
Best regards

Att.:
Winderson Luiz Franzoi Speranzini