Issues with bootstrap 4.0.0.alpha6

Hi, it seem some odd behavior when migrate to BS 4 alpha6, the main cause could be that in alpha6 boostrap substitute .open classes with .show, so, as I see on the code of the bootstrap_dropdowns_enhacement, it still use .open class. Or there is already a version which solve this issue and I dont know.
Thanks in advance. 
By the way, great work!!!