Hello Kaniz,

Thanks again for your effort.

I have tried everything, except the column alias in this form, but that didn't help either.

Cluster settings are also not an issue. Just to be sure, I have created a new cluster, left everything on default and only changed the DBR to 14.3. On Single user mode the code runs seamlessly. When I change only the access mode to Shared and restart, the issue appears.

If you have access to Databricks instance, the issue should be pretty easy to replicate.

I am pretty sure at this point, this is a bug.