We are having an issue in our SharePoint 2019 farm which I have replicated on multiple farms including my own.
The farms are patched at various levels, including one on the latest CU (Feb 2020).
The issue relates to default values on Managed Metadata Site Columns with Lists in Modern View.
This is the reproduction scenario:
Create a Managed Metadata Site Column "ColA" with any Term Store, make it mandatory and give it a default value.
Assign it to a custom Content Type "CT1", and then assign "CT1" to a List (not Library) and remove the built in "Item" type.
Then, when creating a new item, the default value will not populate when creating in Modern View with the "+ New" button.
If I create an item via Classic View or Quick Edit, the default value is populated, but in Modern View it is not.
Any advice or experience with this or similar issue would be good, we have other issues that seem to be related to Managed Metadata too.
Has anyone else had this issue (or similar) and could provide ideas?
P.S. First post, be gentle!