Hi @rajiv460
I know many people who have done this and hence my answer.
If you apply/port your H1B date with new employer, the USCIS will verify your i140 and will reject the application if they have revoked it for fraud/misrepresentation.
This has happened with couple of people earlier. If the i140 has been withdrawn without any fraud, then you can keep using it without any issues. Do not worry.
If you want to have peace of mind, you can have a second opinion by talking to an independent attorney.