The single user implementation used by Kindle and Kobo ereaders is unlikely to have triggered the data race bug.
To quote the SQLite documentation on the bug (
https://sqlite.org/wal.html#the_wal_reset_bug:
Quote:
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The bug only affects databases in WAL mode when there are two or more database connections open on the same file, in separate threads or processes, and when those two connections attempt to write or checkpoint at the same instant.
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