Search option not highlighting the result

2. Os version : iPadOS 14.2

3. Adobe acrobat reader version : 20.10.00 (20201013.161436)

4. Application name : Adobe acrobat reader 

5. I have been facing this problem since past couple of months , before that search feature worked fine.

6. Following are the attached screenshots : I searched Bengal, software does bring me to that page where it finds “Bengal” is written but doesn’t highlight it, so I have to find the word on my own on that page. I have encircled the “Bengal” on those pages but software still doesn’t highlight them.