CI failure

Observed on v1.19 branch:

https://github.com/cilium/cilium/actions/runs/21392880429/job/61583899405#step:45:691

Sysdumps:

cilium-sysdump-conn-disrupt-test-cilium-downgrade-kube-proxy-4-concurrent-20260127-102929.zip

cilium-sysdump-kube-proxy-4-patch-.zip

📋 Test Report [cilium-test-1]
❌ 1/4 tests failed (1/36 actions), 6 tests skipped, 0 scenarios skipped:
Test [check-log-errors]:
🟥 check-log-errors/no-errors-in-logs:pkg/endpoint/watchdog:kind-kind/kube-system/cilium-s97lt (cilium-agent): Found 1 logs in kind-kind/kube-system/cilium-s97lt (cilium-agent) matching list of errors that must be investigated:
time=2026-01-27T10:23:44.944283036Z level=warn source=/go/src/github.com/cilium/cilium/pkg/endpoint/watchdog/ep-bpfprog-watchdog.go:131 msg="Detected unexpected endpoint BPF program removal. Consider investigating whether other software running on this machine is removing Cilium's endpoint BPF programs. If endpoint BPF programs are removed, the associated pods will lose connectivity and only reinstating the programs will restore connectivity." module=agent.controlplane.ep-bpf-prog-watchdog count=16 (1 occurrences)
⛑️ The following owners are responsible for reliability of the testsuite:
- @cilium/endpoint (no-errors-in-logs:pkg/endpoint/watchdog)
- @cilium/ci-structure (.github/workflows/tests-e2e-upgrade.yaml)
[cilium-test-1] 1 tests failed

Despite being an upgrade test, it looks like this test is actually installing v1.19.0-rc.0 and then downgrading to v1.19.0-rc.0 when it experiences the problem.