Wired Chromecast skips tracks for no obvious reason

Roon Core Machine

Intel NUC 7 i5 BNH, Core i5-726OU CPU @ 2.20GHz, 8GB, Win 10 Pro

Networking Gear & Setup Details

Virgin Media Hub 3.0 VMDG500, Ethernet

Connected Audio Devices

Chromecast Ultra wired on ethernet.

Number of Tracks in Library

2.6K

Description of Issue

When using Chromecast as an audio playback device, which I do in the bedroom - it consistently skips over tracks in the queue for no obvious reason. If I go back they play without issue.

Same issue on WiFi, and with other Chromecasts tested in the house.