I am not able to reproduce the nice multi-select mode of Dropdown component. I created the most barebones app possible and am seeing this behavior. I cannot change the selection. Chrome Console spits out some react errors.
Here is my app:
Version info (pulled updates ten minutes ago):
plotly (2.0.12) dash (0.17.7) dash-core-components (0.5.3) dash-html-components (0.6.2) dash-renderer (0.7.3) python 3.5.2