(FIXED) DJI Mavic Mini Remote Controller Beeping (Why, How to Fix)

Let's say you take your Mavic Mini and ready for a flight. So you turn on the Mavic Mini and power on the remote controller. Suddenly, the Mavic Mini remote controller starts to beep continuously. Many Mavic Mini users have faced this DJI Mavic Mini remote controller beeping issue and then been confused about figuring out why it's beeping.