After an initially calm FP1 session in Bahrain, there were two incidents the stewards investigate, and both involve Alexander Albon being ahead of another car on track.
First, as the Thai driver exited the garage, he appeared in the fast lane in front of Yuki Tsunoda's Red Bull. The Japanese driver decided the overtake the Williams in the pit lane, earning himself a visit to the stewards at 16:15 local time for pit lane infringement (at 14:15 GMT).
While Albon was not responsible for the first incident, he also has to go to the stewards at 16:30 local time (14:30 GMT).
That is for impeding his teammate Luke Browning (the young British driver replaced Carlos Sainz this session), after the two nearly collided minutes after the first incident.