Roon Server hangs on Albums view filter when typing 'O' + second letter (ref#K575I1)

What app are you having the slowness issue with?

· Roon

What kind of performance/speed issue are you experiencing?

· The app is crashing

Please try to reboot your Roon Server

· Yes, rebooting helps, but the issue returns after some time

Please try to reboot your networking gear (Router/Switches/etc.)

· No, the issue is still the same even after a reboot

Is there any change in behavior if you try to navigate to Roon Settings -> Library and set both Background and On-Demand Audio Analysis to Throttled or Off?

· No, the issue is still the same

Does the issue happen on multiple Roon Remotes (controllers) or just one?

· Issue happens on multiple remotes

Router Domain Name System (DNS) change

· I was able to change my router's DNS servers but it did not help

What is the operating system of your Roon Server host machine?

· Roon on a NAS (Synology, QNAP, ASUSTOR)

Timestamp of issue occurrences

· All of the time

Describe the issue

Albums view filter hangs Roon Server when typing “O” followed by any second letter — global search works fine

Describe your network setup

ASUS AiMesh routers

Hi all,

I’m seeing a repeatable performance issue with Roon Server on Unraid/Docker.

It’s difficult to say if this issue has always been present, or appeared recently.

Issue

In Albums view, using the local filter/search field:

  • Typing O is fine

  • As soon as I type any second letter after O — for example OV, OA, OB, etc. — Roon Server hangs

  • It does not crash, but becomes unresponsive

  • Individual CPU cores spike heavily.

  • RAM does not spike

  • Playback is fine

  • This happens even with no music playing

  • The global/top search bar and Artist/Tracks view search works fine

  • The issue seems specific to the Albums view filter, not general search

What I’ve checked

  • Roon database/appdata is on SSD cache, not the array

  • Server idle usage is low, around 2% CPU

  • RAM sits around 45%

  • Filters/Focus in Album view are disabled

  • Playback works normally

  • Global search works normally

  • The problem only appears when filtering within Albums view

Current behaviour

The server doesn’t seem resource-starved at idle. It feels more like the Albums browser/filter is getting stuck in a runaway query or bad index state after the recent import.

Looking for advice on

  • Whether this sounds like an Album view index/cache issue

  • Whether a corrupt/odd metadata object could cause this

  • Best way to rebuild/clear the relevant cache/index without risking the whole database

  • Any specific logs I should capture while Roon is hanging

Happy to provide logs if useful. The key reproducible test is:

Go to Albums view → click the local filter/search field → type O → then type any second letter → Roon Server hangs and CPU cores spike.

Hey @Ryan_Kitchen, thanks for the report. I tried to reproduce this on our end, but I haven’t been able to trigger it.

Can you reproduce the issue again and let us know the exact local time and date when it happens? We’ll enable diagnostics for your account and review the logging.

Hey noris, thanks for looking into this. I just reproduced the issue at 05/06/26 17:52:30 BST

Weirdly, the issue seems to be slightly different on the second attempt. Yesterday it was hanging the roon server indefinitely and a reboot was required to resolve it. However today it appears to be complete the search, but O + any other letter is significantly longer (~10 secs) than any other combination of letters which is instant.

And again at 17:57:42, just in case