We recently added a new API for disabling text interaction in WKWebViews that defaults to true. When initializing a new WKPreferences object with an NSCoder, the key will not exist yet and will look like a false value in the coder, causing text interaction to be disabled.
Created attachment 416609 [details]
Committed r271032: <https://trac.webkit.org/changeset/271032>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 416609 [details].