When Dr. Bloom is getting up from her nap/ break, her hair is a lighter and more reddish color than later that same day when it's much darker.
At the start in the opening scene when Dr Reynolds is in the taxi there is a sign saying no mask no ride. Yet when he gets out of the taxi he is not wearing a mask and there is no sign of him removing a mask or ever having been wearing one at all.
Max's video conference call with the opioid patients is a HIPAA violation, as each patient's name is visible to other patients.