Why does Captain America not take the shield in the Avengers Infinity War?

I see that the black panther had offered a shield to the Captain America. The iron man tony had taken the shield from the captain america since they fight in the captain america civil war.

Pics are taken from google images and Avengers Infinity War Captain America Steve Rogers Cosplay Costumes

Within one week, the avengers infinity war would hit the theater. I can not wait to watch the film now.