How to Upgrade on Smart Controller and Amazon App Store

4.21.2 is out 2 days ago but visiting the Amazon App Store on my Smart Controller I don’t see the upgrade ?
I currently have 4.21.1-a installed

Usually it takes about 4 days for an update to appear on Amazon.

I have the same problem

The app is currently being reviewed.

Direttamente da Google Play si può aggiornare

Is there a problem with the Amazon Store upgrade version?

Not that I know off.