Why does the Messenger app lag and freeze so much?

A

AC Question

I've had my LG Enact for about two years now and the Messaging app is starting to slow down and freeze. When I'm in the app, and I receive a message, send a message, or start typing a message, it freezes and lags heavily. Sometimes it downright crashes. When I'm not in the app, I can receive perfectly fine. When I go back into the app to see the message, the app lags. No other app I use slows down like this. And it's not the phone itself freezing and lagging, because I can pull down the notifications menu from the top just fine.