14.0 had some problems in this area. These were fixed in 14.1. Get it here.
In 14.0, one of the causes of the hangs is using the spacebar to replace selected text. Use the delete key instead.
Code insight in 14.0 was another source of hanging. If that is happening for you, uncheck this option:
But, really, your best bet is to get off of 14.0 and use 14.1 instead, and then also get the 14.2 beta if your company allows it. There are lots of things fixed in 14.1 and more in the beta. And relatively few new features. We've really been trying to focus on bug fixes lately. You can get the 14.2 beta here (after you install 14.1). You can see the change log for 14.1 and 14.2 here.