Please get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html . Since this is not a generic issue that we can reproduce at our end, we will need someone to look into your machine to figure out what is going on here.
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
Thanks for reporting this issue, Illustrator team really appreciate this.
We are able to reproduce this issue and it is currently under review.
An error occurred while saving the commentHanna Maes commented
Also in CC2018 my combination alt, shift to duplicate and aline does not work.