Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed between the 2018.1.4.6807.1189 and the 2018.1.5.6835.1218 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 4.19/4.20/4.21 - Wwise 2018.1.5.6835.1218

• WG-38420 Fixed: Crash when Sequencer AkAudioEvent section is garbage collected while playing.
• WG-39056 Lists of available properties in the WAAPI widgets have been updated.
• WG-40197 Ensured the occlusion or obstruction values are properly being set depending on the use of SpatialAudio rooms.
• WG-40318 Fixed: WAAPI Picker does not refresh.
• WG-40420 Fixed: Crash when creating a new actor with AkRoom and AkLateReveb components.
• WG-40542 Added a nice error when you try to generate your first SoundBank with no Event referenced in it.