Drawing Markups and Automatic Cross-Referencing

I am doing some mark ups on some engineering drawings and for some reason it will automatically highlight in a red rectangle a section of the pdf, at the bottom corner of this rectangle will be a blue triangle. Clicking on the red rectangle will make it automatically jump to another part of the document where a similar red rectangle will be highlighted, clicking again will take you to another automatically highlighted section and so on ad infinitum. How do I remove this? I want to edit the document behind these automatically selected references but can't because using the hand tool will automatically select the rectangle. I cannot access the pdf document behind it.

In short I want to remove this rectangle and blue triangle which automatically references another part of the document.