`getAttemptsTaken` returns incorrect counts following a language change

[danielghost]

Following a language change, getAttemptsTaken returns incorrectly as the event listeners for completion are called multiple times, as they are not removed before new instances are setup in onAppDataReady.

If using _hasAttemptBands, this means the wrong branching points are used.

[github-actions]

🎉 This issue has been resolved in version 1.4.1 🎉

The release is available on GitHub release

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