Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed in the 2019.1.8.7173.1554 release of the integration (in addition to upgrading to the new Unreal build).

Note: This integration does not support experimental Unreal Engine 4 features.

Unreal Engine 4.21/4.22/4.23/4.24 - Wwise 2019.1.8.7173.1554

• WG-47309 Fixed: Possible crash when changing an AkAudioEvent associated with a Sequencer section, using the macOS Editor.