Preview notes/highlights offset and uneditable

Recently, I have had a problem with highlighting and adding notes in preview. When I highlight, the correct words show up highlighted in the document, but the side panel shows a set of words which is offset by some variable number of characters. Additionally, there is no way for me to edit my note in the sidepanel. And when I try to click on the yellow square of the note, it starts to appear and then disappears very quickly. So I can't actually see the note when I click on it. Sometime if I try clicking many times very quickly the note will pop up and stay and it will allow me to edit. I have tried quitting/restarting preview; rebooting; many different documents from different websites. All have this problem now. edit: Another symptom of the problem is that when I highlight text, I can no longer click on any links that were active in the text (e.g. an in-text reference). Can anyone please help? Similar to this question , but I'm not seeing duplicate highlights. Just offset highlights and unusable notes behavior. I am running MacOS High Sierra 10.13.6