IntelliJ 15 Spring boot ylm autocomplete error

When i try to use *.properties files auto-completion for Spring Boot app feature works fine: autocomplete name, autocomplete values, show errors with red color.

ScreenShoot .properties file:



But if i try to use the same feature to ylm file, autocomplete for name works fine However autocomplete for values and show error code with red color feature do  not work.

ScreenShoot of this issue



Is it necessary to activate any option in intellij preferences panel to be able to use this feature for .ylm files?

Thank you very much for comunity help!!!!!