Atmos Renderer buffer underrun

[oldskool]

I am encountering persistent buffer underruns while creating a Dolby Atmos Master. The renderer always drops out within the first 20 minutes of a 90 minute feature.

This error occurs even after creating a test file with only a 7.1.2 bed track. This can't be right, because it the renderer is only using 4% CPU, and PT is using virtually no CPU.

Is there a setting somewhere to allocate more memory to the Dolby Audio Bridge buffer?

Edit: In the renderer I have the Dolby Audio Bridge set as the input and Dante Virtual Soundcard set as the output. Is the DVS output setting a possible source for the buffer underrun? I wish the console error log would indicate which buffer is failing.