picamera drc and manual white balance problem

[2gyffg]

I am using python and picamera to take controlled images. I am using manual white balance. Problem is that when I set drc_strength to anything other than 'off', the manual white balance settings seem to have no effect. The values in awb_gains are correct, and I have awb_mode='off', but the picture looks as if awb_mode='auto'. If drc_strength='off', then picture appears consistent with the values in awb_gains.

Is there a problem with using both drc and manual white balance? Is this a bug or am I doing something wrong?

[2gyffg]

Any ideas here?

[6by9]

Drc requires a stats pass. Stats pass recomputes the white balance gains. Sorry, no way around that one.