I've had this problem for years, and I think it's because I often switch my apple account between countries. The update notifications and the updates themselves come through on two different channels, which are usually out of sync.
1. One app will think my account is "in" the U.S., sends me to the App Store for an update.
2. App Store checks and sees that, oh, nope, this is a German account, but maybe try back in few days.
1. One app will think my account is "in" the U.S., sends me to the App Store for an update. 2. App Store checks and sees that, oh, nope, this is a German account, but maybe try back in few days.