I have a rule to make a multi value control field titled 'primary process area' required if a condition is true.

When creating a work item where that condition is true the red ! icon is not appearing next to the field. However as seen in the below screenshot the error is picked up in the banner at the top. The issue being without the icon users don't know what tab to use to find the field they need to fill in.

Is this a bug or is this a feature that multi value controls are missing?
I have a rule to make a multi value control field titled 'primary process area' required if a condition is true.
When creating a work item where that condition is true the red ! icon is not appearing next to the field. However as seen in the below screenshot the error is picked up in the banner at the top. The issue being without the icon users don't know what tab to use to find the field they need to fill in.
Is this a bug or is this a feature that multi value controls are missing?