Text Ads getting deleted if we redeploy an old account which has pendingchange in bce_textAdPendingChange table

For the following redeploy scenario text ads are getting deleted.

Steps to Reproduce.
1. Deploy a Bing account with Paused status using Production build.
2. Re-deploy the account with Production build.

-After redeploy Pending changes will be there in bce_textAdPendingChange table. (refer bce_textAdPendingChange-BeforeRedployWithNewBuild.txt)

-Additional text ads entry added in to bce_textAd with searchEngineIdentifier as NULL (refer bce_textAd-BeforeRedployWithNewBuild.txt)

Adcenter screenshot:BeforeRedeployWithErrorDuingUpdateBuild.jpg

3. Place the Error During Update Fix build.

4. Re-deploy with Error During Update Fix build

-Pending changes are cleared from bce_textAdPendingChange table
mysql> select * from bce_textAdPendingChange;
Empty set (0.00 sec)

-text ads entry are deleted from bce_textAd table and bce_textAd tables has only the entry which has searchEngineIdentifier as NULL. (refer bce_textAd-AfterRedployWithNewBuild.txt)

Adcenter Screenshot:AfterRedeployWithErrorDuingUpdateBuild.jpg

Actual Result: Text ads getting deleted in bing Adcenter and bce_textAd table.

Expected Result: Text ads should not be deleted in bing Adcenter and bce_textAd table.