[MetaSounds][Stereo Mixer] - When changing the gain on the Right channel dynamically, the output has clicks and pops

When changing the right channel gain of the stereo mixer at runtime, it generates clicks and pops in the output.

1) Create a new MetaSound Source
2) Click MetaSound and change the Output Format to Stereo
3) Add a Sine generator
4) Add a Stereo Mixer
5) Connect the outputs of the stereo mixer to the left and right outputs
6) Add an input the the gain of the stereo mixer
7) Connect the Sine generator to the left channel of the stereo mixer
8) Play the metasound and and adjust the gain input 0.0 and 1.0 in real time
9) Connect the generator to the right channel of the stereo mixer
10) Play the metasound and and adjust the gain input 0.0 and 1.0 in real time

Expected Result:
The volume changes smoothly

Actual Result:
Adjusting the gain on the right generators clicks and pops