Roon core becomes undiscoverable regularly after a few hours of being idle

Roon Core Machine

Specs here: Intel NUC Kit NUC7i5BNH Product Specifications
ROCK 1.0 build 254
256 GB M.2 SSD for ROCK
1 TB SATA SSD for local storage

Networking Gear & Setup Details

Router: ASUS AC1900 WiFi Gaming Router (RT-AC68U)

Using Roon via WiFi only. I tried via ethernet, and WiFi sounded noticeably better. NUC PC is plugged into a PS Audio PowerPlant P3 and via USB to a DDC, which feeds the rest of the chain.

Connected Audio Devices

Currently, USB out from NUC to Singxer SU-6 DDC, but have used a variety of other streamers and bridges, both via USB and as WiFi bridges. The issue below has always happened, regardless of downstream devices.

Number of Tracks in Library

Qobuz, Tidal, 865 tracks in local library

Description of Issue

For as long as I can remember, my ROCK server becomes undiscoverable after not being used for a few hours (i.e. Roon app on phone or PC is not able to connect). A simple restart (manual power off, wait a few seconds, power on) always solves the issue. It’s only moderately annoying if I am home, but now that Roon Arc is out, it’s super frustrating that I can’t really use this functionality, as I can’t remotely restart my Roon core. If I have recently restarted my core, Arc runs just fine.

I use a static IP over a strong WiFi connection, and experience no issues in playback while successfully connected.

I believe this is a separate issue, but I’ll also mention that my Roon app on my PC crashes regularly after bringing it back up from being minimized. I have a high-power gaming PC, so computer specs shouldn’t be the issue. Also, music keeps playing if the app crashes, which is why I believe this is separate.

In any case, the issue I’d like to solve in this thread is the oft-disconnecting server.