Js error - Object doesn't support property or method 'closest'

[wlese]

With the latest version rc5 I am getting a js error in IE11 Object doesn't support property or method 'closest' Reverting to rc4 works fine. Anyone else seeing this? (I was unable to tag the version as rc5 for some reason...) Thanks

[Madison3]

When I open a dropdown with autoclose and then click on the scrollbar in edge, an error is thrown in the console.

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