Visible crew/equipment: In London's suite, when Arwin opens the door to the porch where the hawk is nesting, the reflection of a crewmember wearing a white shirt is visible on the door's glass panes.
Visible crew/equipment: When Cody and Zack walk into London's suite and find Moseby there, crewmembers are reflected on the glass door behind Cody. First in the wideshot, when Moseby explains the plan to capture the bird and then in Cody's close-up.
Answer: Keep in mind, Muriel wasn't very popular. So the writers/directors must have thought it'd be a good idea to let go of the character. No one seems to be complaining.