You must update the integration (via HACs) and the app (by the link below) to both be v0.3.3. If these are out of sync you will likely experience issues.

Download the apk from vaca-0.3.3.apk

New features & improvements

• Improved the gain function to be semi automatic and provide better voice pickup - issue #10
• Change gain settings to be in range -10 to +10. Default 0 to work with new gain function

Bug fixes

• Fixed issue causing a delay before listening for command after wake word detection - issue #12
• Fixed issue where screen would not show webview if HA restarted while device in screen sleep
• Fixed error when using ask a question action - issue #13
• Fixed memory leak in config change listeners

Full Changelog: v0.3.2...v0.3.3