Roon Remote dropping connection to Core and crashing on all of my IOS devices

Core Machine (Operating system/System info/Roon build number)

Windows 10 Pro, Core I5 4310U CPU, 8GB Memory, 128 GB SSD, Roon 1.8 Build 756 64 bit. Dell laptop.

Used to stream from local NAS and with Tidal.

Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)

Google Wifi Router (Mesh with 2 mesh units) used as network DHCP server, connected to BT modem PPPoE (no double nat).
Gigabit ethernet network via TP-Link 24-Port Gigabit Ethernet Switch, TL-SG1024D

Core, connected via Ethernet, DHCP but static IP assigned by router
Music library on Synology NAS (shared folder), also connected via ethernet

Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)

Project Stream BOX S2 Ultra (ethernet connection to network) → Benchmark DAC 3 via USB
Apple TV (x 2) (ethernet connection to network) using airplay
Naim Mu-so QB Gen1 (x 2) (ethernet connection to network) using airplay
IOS Remotes all connected via wifi:

  • Iphone 8IOS 14.4
  • Iphone 12 mini IOS 14.4
  • Ipad 6th Gen IOS 14.4

Windows 10 Laptop remote connected via wifi
Samsung Tab S SM:T700. Android 6.01 Remote connected via wifi

Description Of Issue

All of my IOS devices when used as remotes, continuously drop connection to the Core (frequency inconsistent - sometimes happens seconds after opening the Roon app, but always within about 20 seconds of using the app).

Sometimes the app reconnects, but often the app completely crashes. Roon pretty unusable on the IOS devices at the moment. This happened before the recent 1.8 release, and continues to happen after Roon 1.8 update was installed.

Affected devices:

  • Iphone 8IOS 14.4
  • Iphone 12 mini IOS 14.4
  • Ipad 6th Gen IOS 14.4

Have tried uninstalling and reinstalling the roon remote app on IOS devices, but no improvement.

The problem does not occur with my non IOS remotes e.g.

  • Windows Laptop (MS Surface pro 4)
  • Samsung Tab S SM:T700. Android 6.01

Non IOS devices stay connected to Core reliably, and do not crash.
Music streams to all audio devices reliably and is stable

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