Hi Jayant,
Based on my understanding, you are trying to enter the exact same text as the “ghost text” into its corresponding text box. You are then saying that anything typed after this will automatically delete the manually entered text that you had previously entered. Please let me know if my understanding is not accurate.
This is indeed a product bug and is not expected behaviour. We have a defect logged to track this issue internally.
Please follow up with me if you need additional information.
Thanks,
James