H1B Transfer - Full Time - RFE


I currently work for a major US tech company. I applied for a change of employer for another such tech company.

I have received RFE on Employee-Employer relationship which is weird as this is a full time on site senior position. The lawyer is asking to join the new company to have paychecks which will strengthen the case.

Could any one advise if it is wise to join on receipt now?