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Wrong validation behaviour when creating SharePoint list items with required columns and ContentTypes?

I'm trying to build a PowerApps based Canvas Apps which communicates with SharePoint.

In SharePoint I have a ContentType enabled list and I added one custom column 'TestCol1' as required column. This column is used only in one of the various ContentTypes (e.g. ContentType1).
When using SharePoint to create a new ListItem, it is possible to add new items without providing values for 'TestCol1'. An value for 'TestCol1' is only required if the ContentType is set to ContentType1.
I also tried to use GraphAPI and the behaviour is the same.


But in PowerApps I always have to supply a value for 'TestCol1' regardles of the ContentType. Is this a bug?


As a workaround I could use custom columns not marked as 'equired and only set them to required in the using ContentTypes. But unfortunatly it does not seems to be possible to change this for existing columns.


Any ideas? Thank you!


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