Expandable folder no more available in file-collecions

As the title suggests, I can no longer use the expandable folder function in File-collections after version 13.17. Is this on purpose or a bug?

Version 13.17.1~13.17.4

Available in Version 13.17 and before

It’s intentional, due to a humber of problems that have always existed when expandable folders and collections are used together.

We may allow the combination again in the future.

Thanks for the reply. The function is convenient for my workflow, so I will stay in version 13.17 for a while until you get this fixed. Looking forward to the next available version :clinking_beer_mugs:

Note that you can still expand folders inside of collections; it's just sub-collections that currently can't be expanded.

Are there any updates on this in the near plan?