EB2 to EB1 porting still available?

[legalresident]

I heard from my company HR that, USCIS recently stopped EB2 to Eb1 porting? I don't have any reference links? Anyone has idea on this? 

Also for EB1-C category, is there any expiration/non-consideration to the work experience gained outside USA (1 year rule related to below) after spending 5 years in USA?

1. Additionally, you must have been employed outside the United States in the 3 years preceding the petition for at least 1 year by a firm or corporation and you must be seeking to enter the United States to continue service to that firm or organization. Your employment must have been outside the United States in a managerial or executive capacity and with the same employer, an affiliate, or a subsidiary of the employer.