Audio problem: When Happy is talking to Peter in the kitchen at the charity event, from the angle over Happy's shoulder he's talking but the side of his face isn't moving, from that angle we should see his chin move up and down.
Audio problem: When Pikachu has coffee cups all over Harry's office, Tim starts knocking them over. The cups make a plastic/can sound, but the cups are cardboard.
Audio problem: After Harlan knocks over the Go board, Marta says "I'm done with you." When she says that, which is when she puts the two vials on the table, her mouth isn't moving.
Audio problem: Towards the end Fraulein Rahm sends a child towards the Americans after pulling the pin on a grenade attached to him. He runs offscreen but no explosion is ever heard.
Suggested correction: So the grenade was (thankfully) a dud. Considering they were wearing paper uniforms, it isn't unreasonable to assume they didn't have the highest quality equipment.