My network is Unifi based too and has been working reliably for years but some of it was unsupported/legacy and I decided to upgrade recently so it’s now total overkill (10Gbps backbone between gateway and the two rack switches) and a pretty flat structure so my “core” switch is only 1 hop to every other switch (and the gateway). All my house services are on the other rack switch. All my audio gear is in one VLAN (I do have others but they are not talking to Roon/ropiee etc).
When 2.58 bridge was released I encountered a bunch of short buffer issues that had me talking to Roon support and they were basically blaming my network. Streaming pauses due to short buffer since 2.58 build 1608 (ref#V02BJ2)
These issues have continued, although I haven’t reopened the support case because it didn’t really go anywhere.