Someone owning a Lumia 630? Has multitasking been fixed for internal apps?

Hi,

When I first heard about the multitasking in 8.1 I was very happy. Finally it was like W8.
How ever only for apps built on WinRT.

My biggest problem right now is how MS internal apps seem to work differently.

For example:

Mail: Open Mail -> Press Back (Short) -> Mail closes back to home -> Press Back (Long) -> Mail is not in the multitasking overview.

Calendar (or Podcasts or Reading List): Open App -> Press Back (Short) -> Calendar closes back to Home -> Press Back (long) -> The app is still in the multitasking view, like it is supposed to be for 8.1 apps.

Has MS fixed that wrong behavior of mail, messages, settings etc. on the build running on the L630?