@e[name=] does not work with names in non-english languages

Selector @e[name=] does not work if name is in Russian.

Steps to Reproduce:
1. Summon a mob with a name in Russian (Example: /summon Pig ~ ~1 ~

{CustomName:Пятачок}

)
2. Use any command using selector (Example: /testfor @e[name=Пятачок])
3. Command block output is "The entity UUID provided is in an invalid format".