ROCK: iPhone app worked, then lost contact, ok after reinstall

My son and I installed ROCK on a NUC, on wifi and with a direct USB connect to storage and DAC.
The iPhone app found the ROCK worked ok.
The next day, the iPhone app could not find the ROCK.
Uninstalled and reinstalled the phone app and it worked.

We verified that the ROCK had the same IP address as before, in spite of DHCP.
And that the iPhone was on wifi.

I have no more troubleshooting info or logs on this situation, unfortunately.

This is troubling. Unreliability is a killer as we aim to expand to a broader market. Let’s keep an eye on it.