I don't know if this is a bug or if it just takes longer for an Attribute to show up but...
In the change to Cast for Arrival (2016) three motion capture actors were added a couple of days ago. The names got added but the Attribute (motion capture) is not being displayed:

However, if you Edit the Cast, the Attribute IS there:

Reporting in case it is not already on you list of things to fix.
In the change to Cast for Arrival (2016) three motion capture actors were added a couple of days ago. The names got added but the Attribute (motion capture) is not being displayed:
However, if you Edit the Cast, the Attribute IS there:
Reporting in case it is not already on you list of things to fix.