Looks like a new test was added in Kubernetes 1.29, brought in with #29473, and has been failing ever since.

The test in question is at https://github.com/kubernetes/kubernetes/blob/55f2bc10435160619d1ece8de49a1c0f8fcdf276/test/e2e/network/service.go#L3639-L3648, and tests for Service routing different protocols on the same port (that is, TCP and UDP).

Exact line it's failing is:

[sig-network] Services [It] should serve endpoints on same port and different protocols [Conformance] [sig-network, Conformance]

Artifacts:
cilium-sysdumps.zip
kind-logs.zip

The summary appears to indicate a timeout, but I can't find it in the logs:

[FAILED] Timed out after 32.740s.
Expected
    <nil>: nil
not to be nil
In [It] at: test/e2e/network/service.go:3730 @ 12/01/23 01:36:03.931