Click on underlined word does sometimes not put the cursor there.

Here it works, but on Hacker News I have to click a second time, or close the pop up.

Start by reproducing the cursor-placement problem on Hacker News and compare it with the behavior described as working here. Done means a single click on an underlined word places the cursor correctly without requiring a second click or closing the popup.

Written by the indexing model from the issue text.