With many apps an issue for changelog writers is that often behavior is tied to feature flags, which can be remotely enabled. Thus a new feature is rolled out in the app but only visible to some testers. Only after a while it's enabled for all users. Thus app release is independent from availability of a feature.
That said "Bugfixes and performance improvements" is as useless as it gets ...
That said "Bugfixes and performance improvements" is as useless as it gets ...