The Command:
give @p written_book 1 0 {author:"Juzim14",title:"",pages:["{text:\"test\",color:red,extra:[{text:\" test2\"}]}"]}
does this (picture 1), but should do this (picture 2). Please fix, that is really annoying if you want do sth with clickEvent.
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Comments 2

wohoo thank you 😃
See MC-55373 about the inheritance of properties.