spark textInput in Flex 4.12.1 and 4.13 issue

Question

When a spark textInput is used with displayAsPassword=true in Apache Flex 4.12.1 and 4.13 throws "ReferenceError: Error #1065: Variable flashx.textLayout.factory:TextLineFactoryBase::_pass0Lines is not defined."

Works well if either spark textInput is replaced with mx textInput or Flex 4.12 and earlier.

Thanks