Error: Groupings not showing when using a "Custom Expression" or a "Common Expression"

There is an issue when rendering multiple Grouped columns in a table view with a Custom Expression or a Common Expression

Here are some screenshots explaining the issue:
when using a Custom Expression or a Common Expression

Not every Grouped by columns are showing

but when I change the Custom Expression for a simple Sum of

then it shows everything without any issue:

##Thank you for your awesome job. I hope this can help you to have an even better product.

Sorry, I forgot to add this information.

Metabase version: 0.25.1
Operating System: Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-71-generic x86_64)
Browser versions: Version 59.0.3071.115 (Official Build) (64-bit)