App "No longer available" on old iOS after bumping deployment target

Hello,

we have a fairly old app that until very recently had iOS 9.3 as minimum deployment target.

After increasing the deployment target to iOS 11, I can no longer open the App on my iPad 2 with iOS 9.3 with an Alert ""App" Is No Lonager Available".

And I can not download the App from the AppStore on iOS 9.3 with an alert "Unable to Purchase - "App" is not compatible with this iPad."



I thought it was supposed to work the way that, when updating the deployment target, users on older OSs can still use and download the last compatible version of the app?

In the AppStore under "Pricing and Availability" -> "Last-Compatible Version Settings", All Versions are checked!


Is there something we have missed?

App "No longer available" on old iOS after bumping deployment target
 
 
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