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Fix static IP issue for Azure internal LB
**What this PR does / why we need it**:
Fix regression for Azure internal LB with static IP support
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#56686
**Special notes for your reviewer**:
**Release note**:
```release-note
```
86ff044d84