Monk's Elemental Strikes Aren't Getting Proficiency Bonus

On my character sheet, when I activate Elemental Attunement, the Elemental Strikes ability on the character sheet does not seem to calculate a character's proficiency bonus. 

My normal unarmed strikes give dex + proficiency bonus, so it would be 1d20+5 for attack rolls. When Elemental Attunement is activated, the new Elemental Strikes attack is added to the Actions sheet (Near the bottom or on the Other tab).

The attack roll for Elemental Strikes is only 1d20+3 instead of 1d20+5.

I'm not seeing any information that suggests the Elemental Strikes do not gain from a player's proficiency bonus.