author role and codes in the post

Hi,
My website has a few users. I found that whenever a post that was published by a user with admin access was later updated by a user with author access, the codes (such as google map, Instagram…etc) are all messed up.
Is this because users with author access can’t update posts with codes embedded in it (the user confirmed that he didn’t touch the coding but the codes were still messed up after he saved his changes)?