Then the issue then should be easy to fix. I think it is happening on Beta and not on Nightly because of the feature that allows overriding Onboarding from Leanplum (bug 13861920). Leanplum is enabled by default on Beta+ but not on Nightly. If overriden values for onboarding are not found / downloaded from Leanplum then the app will fallback on the "default" local values. But this values which Leanplum falls back to have not been updated in bug 1546617. Will work on a quick fix, thanks Eliza!
Bug 1547924 Comment 3 Edit History
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Then the issue then should be easy to fix. I think it is happening on Beta and not on Nightly because of the feature that allows overriding Onboarding from Leanplum (bug 1386192). Leanplum is enabled by default on Beta+ but not on Nightly. If overriden values for onboarding are not found / downloaded from Leanplum then the app will fallback on the "default" local values. But this values which Leanplum falls back to have not been updated in bug 1546617. Will work on a quick fix, thanks Eliza!