I’ve had a problem for the past year (yeah I know I’m a little late reporting it) where it takes anywhere from 5-10 seconds to select text when editing a note. If I double click a word, it literally takes an average of 8 seconds for the app to respond with it being selected and the toolbar appearing with options. It basically makes the app unusable to me for editing notes, as evidenced by the fact that I had imported, deleted, and filed all my Apple Notes… and now I am back up to 600 notes again. I kept thinking someone would report it and a fix would happen, but it has persisted across multiple iOS and DTTG upgrades.
Before posting this, I completely deleted the DTTG app and all data off my iPhone and redownloaded it from the App Store. I created a new note in the Global Inbox and saved it. It only had the word Hello in it. As expected, when I edit the note and double click Hello, it takes 8 seconds to select it and the cut/copy/etc. toolbar to appear.