AWS::Kendra::Index update of tags results in loss of tag

[JimOjpn]

When creating a Kendra index the tags are correctly with the following:

  KendraIndex:
    Type: AWS::Kendra::Index
    Properties:
      CapacityUnits:
        QueryCapacityUnits: 1
        StorageCapacityUnits: 1
      Description: Box and other source files
      Edition: ENTERPRISE_EDITION
      Name: "kendra-index"
      RoleArn: !GetAtt KendraIndexIamRole.Arn
      ServerSideEncryptionConfiguration:
        KmsKeyId: !Ref ProcessingKMSKey
      Tags:
        - Key: Environment
          Value: !Ref EnvironmentType
        - Key: MarketCode
          Value: jp
        - Key: Organization
          Value: <text>
        - Key: Owner
          Value: <text>
        - Key: Project
          Value: !Ref ProjectName
        - Key: test-tag 
          Value: "test123" 

Results in:

When changing the test-tag and redeploying:

KendraIndex:
    Type: AWS::Kendra::Index
    Properties:
      CapacityUnits:
        QueryCapacityUnits: 1
        StorageCapacityUnits: 1
      Description: Box and other source files
      Edition: ENTERPRISE_EDITION
      Name: "kendra-index"
      RoleArn: !GetAtt KendraIndexIamRole.Arn
      ServerSideEncryptionConfiguration:
        KmsKeyId: !Ref ProcessingKMSKey
      Tags:
        - Key: CostCenter
          Value: !FindInMap [EnvironmentToCostCenterMap, !Ref EnvironmentType, CostCenter]
        - Key: Environment
          Value: !Ref EnvironmentType
        - Key: MarketCode
          Value: jp
        - Key: Organization
          Value: <text>
        - Key: Owner
          Value: <text>
        - Key: Project
          Value: !Ref ProjectName
        - Key: test-tag 
          Value: "test123345"

Results in the tag being deleted:

Expected behavior is for the tag value to be replaced.