Keychain values not readable when upgrading Android app from Qt5 to Qt6 (qtkeychain 0.14.1)

[kage-p]

The existing stored values cannot be read (returns error "EntryNotFound").
Our app is storing data offline which is encrypted with a password in the keystore so the user loses this data if we cannot get the key.

Android is reporting the exact same package id and uid. The namespace and keys used in the keychain are are the same.
The only other change is the gradle configuration which had to be updated to work with Qt6
I replicated in a minimal test app running from the IDE (APK is unsigned); additionally the issue is present when updating our release app which is signed with the same cert. I note the underlying Qt6 JNI code has vastly changed which could be the source of the issue.

Any clues for what is happening?

[kage-p]

Note: if I switch the test app between the Qt5 and Qt6 configuration and run it again, keys appear to be stored separately for each, as if it is a different app

[kage-p]

testApp.zip