First things first, you should test your ammonia and nitrites to make sure they are not causing an issue.
The thing with aquariums is not all fish make it. You can buy 20 fish, but nobody says all 20 are going to make it to adulthood, or live a long and full life - just like if you take 20 people, certainly at least 1 is bound to die young from some disease or another. When a fish dies but the rest of the tank is doing very well, it really isn't worth fretting about. Test your levels to assure yourself the aquarium is in good condition, and move on.
Amano shrimp will jump occasionally, it really isn't a huge concern -IF the rest of the livestock is doing well and the aquarium is in good condition.