He cannot garnish your wages while you are in a Ch13. Of course you should let your attorney know.
You should know, however, that your BK is not going to discharge the rent you failed to pay after the BK was filed.
You should let you bankruptcy attorney know about this situation, since you are in chapter 13.
The lease agreement will need to be reviewed, and you likely will benefit further assistance from an attorney knowledgeable in landlord/tenant matters.
General legal advice is offered for educational purposes only. A consultation with a qualified attorney is required to determine specific legal advice as to your situation and applicable law. We are a debt relief agency and we help people file for relief under the bankruptcy laws.