Fix: adsc is blocked by sync chan (#29209)
Fix: adsc is blocked by sync chan (#29209)

Signed-off-by: huabing zhao <441d2a739d61d39382105e80b4a4d1c407fc3448@tencent.com>

Co-authored-by: huabing zhao <441d2a739d61d39382105e80b4a4d1c407fc3448@tencent.com>
istio/istio,istio/istio,istio/istio,istio/istio,istio/istio