Props Disappearing

Hey guys! So I’m trying to code a scene where a character is reading his textbook, I added the prop to his character but whenever he does the reading animation the book just disappears after a second and the animation still continues without the book.

Here’s my script from the beginning of the scene:

INT. CLASSROOM DESK - DAY with DESK CLASS
@zoom reset
@MALE1 spot 1.637 68 -73
@MALE1 faces right
@add Text Book Open Navy Blue to MALE1
@MALE1 starts read_sit_book_open_neutral_loop

(This is all I have so far)
The book shows up for one second and disappears, leaving me with this:

The code works fine and there are no errors. I made other scenes where the props and animations worked just fine. Is there a way I can fix this?