kubernetes: DualStack: incorrect service state after pod deletion

What happened: Service IP to pod ip mapping is not getting removed from ipvs rules after corresponding pod deletion.

What you expected to happen:

How to reproduce it (as minimally and precisely as possible): Create a tcp ipv6 loadbalacer service with couple of pods. Then delete pod deployment alone. List ipvs rules using “sudo ipvsadm -Ln”. Even after pod deletion, service ip maps to deleted pod ipv6 ips.

Anything else we need to know?:

Environment:

• Kubernetes version (use kubectl version): 1.17
• Cloud provider or hardware configuration: Azure
• OS (e.g: cat /etc/os-release): ubuntu16.04
• Kernel (e.g. uname -a):
• Install tools:
• Network plugin and version (if this is a network-related bug): kubenet
• Others: