Thank you for reaching out. It would be very hard to tell why this is happening? My initial guess is, the affected file may not have been created using an Adobe application.
If possible, please share the file with us. We will take a look and share our findings. You can upload the file to a cloud drive and then share the link with me via Private message. To access the private message option, click on my profile Avatar and on my profile you should see the option "Send Message".