RTCSession Error if synapse workers enabled

[watermelon0339]

Describe the bug
After enabling Synapse workers, Element Call stops working and reports an RTCSession error.

To Reproduce
Steps to reproduce the behavior:

1. Edit hostnames.yaml to enable synapse workers:

      synapse:
        ingress:
          host: matrix.xxx.xxx
        resources:
          limits:
            memory: 12Gi
        media:
          maxUploadSize: 50M
        workers:
          background:
            enabled: true
          client-reader:
            enabled: true
            replicas: 1
          encryption:
            enabled: true
          event-creator:
            enabled: true
            replicas: 1
          event-persister:
            enabled: true
            replicas: 2
          initial-synchrotron:
            enabled: true
            replicas: 2
          media-repository:
            enabled: true
          presence-writer:
            enabled: true
          push-rules:
            enabled: true
          pusher:
            enabled: true
            replicas: 2
          receipts-account:
            enabled: true
          sliding-sync:
            enabled: true
            replicas: 2
          synchrotron:
            enabled: true
            replicas: 1
          typing-persister:
            enabled: true
          user-dir:
            enabled: true

2. Re-deploy helm chart helm upgrade ......
3. Make a Element Call by ElementX App
4. Error occured:

    RTCSession Error
    The MembershipManager shut down because of the end condition: Error: Could not restart delayed event, even though delayed events are supported. M_UNRECOGNIZED: MatrixError: [404] Unrecognized request (https://matrix.mtx01.cc/_matrix/client/unstable/org.matrix.msc4140/delayed_events/syd_aRnWkIJhnZGrpKFjazgR)
   

Expected behavior
Element Call should work.

Screenshots

Desktop (please complete the following information):

• App: Element X 25.06.02
• Browser: edge

Smartphone (please complete the following information):

• Device: Android
• OS: android 11
• App: Element X 25.06.02

Additional context

• ess-helm version: 25.6.1

[watermelon0339]

POST /_matrix/client/unstable/org.matrix.msc4140/delayed_events/syd_PEDCpFvsRFtxThipJQGV

{
  "errcode": "M_UNRECOGNIZED",
  "error": "Unrecognized request"
}