_ContentMixin.getCurrentContext() returns incorrect context on ContentArea->Create a new Block

I have a custom component on a block that uses the _ContextMixin as described in the following link

https://world.episerver.com/documentation/developer-guides/CMS/user-interface/Context-sensitive-components/

If I create a new block the context describes the block where the property exists as expected.

If I, on the other hand, have a page with a ContentArea and clicks the "Create a new block" link on that content area, the context returned is not the block context but the page context where the ContentArea is located.