Book and quill and written book cannot be opened while looking at a mob

Summary:
A book and quill or written book cannot be opened while looking at any mob except piglins and piglin brutes.

Steps to Reproduce:

1. Obtain a book and quill or written book
2. Spawn a mob
3. Stand close to the mob
4. Attempt to open the book while looking at the mob

Observed Results:
The book cannot be opened.

Expected Results:
The book is opened.

Video:
Minecraft 2021-03-16 09-44-38.mp4