smex caused multiple-cursors incorrect behavior

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I'm using emacs 25.1 on mac. I found smex-20151213.609 can cause incorrect behavior of multiple-cursors-20160802.1155. You can check my terminal recording at https://asciinema.org/a/88823 and I've added description under the recording.

Since emacs 25.1 was released just a few days ago, is it because smex does not compatible with it? It's just my guess because the most recent version of smex is from 2015. Can anyone help me to confirm the problem? Thanks in advance.

Also see the issue I opened at multiple-cursors project: https://github.com/magnars/multiple-cursors.el/issues/268