Saalooo10

I am using the professional version and when I search for a word on my document that has PDF attachments, it says there are 3 similar words (as shown in the screenshot), then when I press enter or the arrow button to locate the word, it does not take me to the word but rather it just goes from 1-3 in the search bar, sometimes it takes me directly to the word then it shows me the amount of similar words left which is what it's supposed to do. Does anyone know how I can fix this or why this is happening? thank you!