Audio Drops Out - Premiere/Blackmagic Intensity Pro

I've posted this on Blackmagic's forum as well. Hoping someone on one site or the other has experienced this and has come up with a solution.

This has been going on for a while. I'm editing in Premiere Pro CC (up to date: v.12.12) and I tab out to another app. When I come back, audio does not play back even though the VU meters indicate it is there. My workaround is to:

1. Go into Premiere Pro>Preferences>Audio Hardware>Default Output

2. Switch it from Black Magic Intensity Pro 4K to Built-in Digital Output (though I think I could choose any output other than Black Magic)

3. Hit OK to leave Preferences

4. Go back into Premiere Pro>Preferences>Audio Hardware>Default Output

5. Switch it back to Black Magic Intensity Pro 4K

6. Hit OK to leave Preferences

I can now hear audio. Until the next time I need to leave Premiere Pro. Obviously, I would prefer not to have to go through all these steps, sometimes multiple times per day. Anyone have any idea how to address this?

Martin

Early 2009 Nehalem MacPro4,1, 2 X 2.6 GHz Quad-Core

OS 10.11.6

Samsung 850 EVO 1 TB system drive

32 GB RAM

ATI Radeon HD 4870 GRFX Card

Blackmagic Intensity Pro 4K, Driver: 10.8.2

Avid Media Composer v. 8.6.1

Adobe Premiere Pro CC 2018, v. 12.12 (Build 69)