Pokemon-go – Why won’t it let me evolve to jolteon

The only solution I've found so far is to close the application completely and relaunch it. This problem extends to Pokéstops not refreshing until you've moved far away enough and restarted your application.

Reinstalling the game will not solve the problem, personally I've reinstalled the game over 10 times and had it run from both my SD card and Device Storage.

Running on Samsung S4 Android Lollipop 5.0.1

This is perfectly normal. Pokémon have always had various noises as their "cry" in the games, even in the originals. In gen 6, all of the cries of older pokemon were "updated" to sound less harsh. Pikachu was the only pokemon changed to say its name instead of making an electric sound.