Updates to Forge Subscriptions Not Causing Red Update Button

[Rivanknight220]

As the title states above, I'm not getting a notification via the Check for Updates button that some of my subscriptions have newer versions. The button looks normal but when I click it I see some of them update. Is this as intended or a known bug?

[Trenloe]

This is the current intended functionality.

[LordEntrails]

And it's already on the Forge Wish List.