Achievement banners are never shown even after calling GameCenterPlatform.ShowDefaultAchievementCompletionBanner(true)

To Reproduce:

1. Deploy the attached project an iOS device or the AppleTV (set 'Enabled Touch Controls' to true on 'GameCenterTest' component if testing on iOS).
2. Click 'Authenticate User' and enter '100' in text field or swipe the touchpad.
3. Click 'ReportProgress' observe that progress for the achievement is reported successfully and it's shown as completed in 'AchievementUI' but the CompletionBanner is never shown.