FedEx believes it should not be expected to enforce the export ban and could not reasonably be held liable for shipping products that it did not know about.
The ongoing tussle between the two firms comes as Beijing and Washington face off in a trade war.
China is considering placing FedEx in the 'unreliable entities list'.
China launches an investigation into FedEx's 'failure to deliver express packages' while Huawei reviews ties with the service company over the mishap.
FedEx says it will fully cooperate with any regulatory investigation on how it serves its customers.
The mix-up comes as Huawei faces US moves to blacklist the company, cutting it off from American-made components it needs for its products.
Huawei is reviewing its relationship with FedEx Corp after it claimed the US package delivery company diverted two parcels destined for Huawei addresses in Asia to the United States without explanation.
'SameDay Bot' is designed to travel along sidewalks or roadsides carrying small shipments to homes or businesses.
The parcel company announced in December that it would be offering voluntary buyouts to ease pressure on profits.
The package-hauler plans to add 12 of Boeing’s medium-size 767 freighters and 12 of the larger 777 cargo aircraft to its order book, the Chicago-based planemaker said in a statement Tuesday.
It was Johnson's 18th career PGA Tour victory and his second at the St. Jude Classic, which he also won in 2012.
Johnson, who took a one-shot lead into Saturday's third round at TPC Southwind in Memphis, had six birdies and one bogey in his five-under effort to join Putnam atop the leaderboard on 15-under 195.
FedEx says higher peak-related costs, integration costs of its Dutch TNT Express unit, bad weather, and other factors sapped profit by about US$170 million year-over-year.