[Bug] TC-WEBRTC-1.6 failing at Step 9 in TH UI – Expected Success but received Not_Found

[Ashwinigrl]

Describe the bug

While executing TC-WEBRTC-1.6 using TH UI (TH Version: v2.14.1-beta2+spring2026 Sha: 28fa53b), the test case fails at Step 9.

According to the test step expectation, the response should be Success. However, the current response received is Not_Found, which causes the test case to fail.

Steps to reproduce the behavior

1. Open the UI
2. Upload the relevant PICS file.
3. Update the UI configuration as per the Test case requirements.
4. Ensure the TC-WEBRTC-1.6 test case is selected
5. Executed the below mentioned command to put DUT into a commissionable state, ./chip-camera-app --camera-test-audiosrc --camera-audio-playback
6. Click the Start button on Test-Harness user interface.

Expected behavior

Test case should pass without any errors.

Log files

webrtc_1_6_2026_03_05_09_55_21.log

TC-WEBRTC-1.6(DUT).txt

PICS file

No response

Screenshots

Environment

TH Version: v2.14.1-beta2+spring2026
Sha: 28fa53b

Additional Information

No response

[Ashwinigrl]

@chulspro, @yufengwangca and Could you please take a look at this issue?

[LX2035]

@Ashwinigrl , I saw that you clicked 'pass' on the two-way voice part, can you hear the test audio on your browser?