Traveling Trader issues a "state != LangLineState:: Key" assert

Partner Rank: 4

Verification builds: Beta 1.12.0.2 release 2039725

Summary: Traveling Trader issues a "state != LangLineState:: Key" assert

Impact: Asserts are bad, no apparent impact on the functionality of the map though.

Repro Steps:
 - Open The Traveling Trader map from the Minecraft Marketplace

Observed Results: This assert but no apparent issues as a result of it. Everything seems to be functioning correctly.

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Assert Failure - ctrl+C to copy this message to the clipboard!
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Assertion failed: Invalid lang file format.
Condition is false: state != LangLineState::Key
Function: Localization::appendTranslations in f:\darwinwork\5\s\handheld\src\common\locale\localization.cpp @ 282

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OK
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Expected Results: Not an assert

Screenshots/Videos attached: 

Regression builds: 1.11