Avatars Stop Functioning After ~12 Minutes on Quest 3 Standalone Build

Unity Questions
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1

Platform: Unity, Quest 3 Standalone VR Build

Issue Summary:
I’m experiencing consistent failures with ConvAI avatars approximately 10-12 minutes into the experience when deployed as a standalone build on Quest 3. The issue does not occur (or is minimal) when testing in Unity Play Mode.

Symptoms (multiple failure modes occurring):

  • Avatars stop responding to user prompts entirely
  • Text transcription of user speech stops working
  • Avatar begins responding but audio cuts out mid-response while lip sync continues
  • Feels like a memory/cache limitation being reached

Project Setup:

  • Built in Unity for standalone VR (Quest 3)
  • 5 total ConvAI avatars in the experience
  • Each avatar exists in its own separate scene (only one ConvAI avatar per scene)
  • Issue occurs only on standalone builds, not in Play Mode testing w/ PCVR

What I’ve Ruled Out:

  • No custom data structures allocating to heap/cache on my end
  • Issue timing is consistent (~10-12 minutes) regardless of interaction pattern

Questions:

  • Could the multi-scene setup with 5 separate avatars be causing memory accumulation across scene loads?
  • Are there known Quest 3 standalone limitations or memory constraints I should be aware of?
  • Are there any diagnostic logs or debugging steps you’d recommend to isolate whether this is a client-side or server-side issue?

Any guidance would be greatly appreciated. Happy to provide additional technical details if needed

2

Hi :waving_hand: not sure what that is, I have a Meta Quest 3 app using Convai too, I can use it for several hours without issue, with 1 or 2 avatars on screen.

With relation to whether it’s a memory issue, are you aware of the OVR Metrics Tool from Meta? It enables a UI for any app so you can see things like memory usage etc :

https://www.meta.com/en-gb/experiences/ovr-metrics-tool/

3

Have used the OVR debug tool throughout this process but only using the FPS graph, is there a different memory graph or UI element I shld be looking at to see if memory is cacheing out?

4

Hi, yes, if you look through its options you’ll see memory usage etc.