Dim display w/ white dots circling - need non-hack solution

Hello,

I am using RPi 3 with Volumio 2.041 and HiFiBerry DAC+ Pro. I recently ran into a few issues getting this setup.
I’m using my home WiFi to control Volumio via a laptop.

The last issue that I fixed with help from another post on here is while I could access the Volumio UI via browser, the screen was dimmed with white dots circling around the center. I was able to fix this by editing /volumio/http/www/app/local-config.json
(change the localhost IP from 127.0.0.1 to the IP address currently assigned by my WiFi equipment)

However this will cease to work if I reboot my RPi and it is assigned a different IP address.

Thanks for any advise on a more robust solution.