Volume control not working in Roon w. HQPlayer

I’ve got this USB-puck connected to my Roon server mac. It is programmed with Roon keyboard shortcuts to control volume, play/pause and skip, so I can do basic control without even having the iPad app running.

HQPlayer is on the same Mac mini. NAA is on another Mac mini connected to the DAC with no preamp, so I need SW volume control.

As a temp fix, I can place the cursor in the HQPlayer volume control field, but it won’t do play/pause etc then. It is not as responsive to change either. The two Macs are headless, so I control Roon from an iPad. Adjusting volume directly on the screen in the app is not working either. You can set a new value, but it immediately bounces back to the value set in HQPlayer.