Lectern running /clear turns items into ghost items

The bug

When running /clear in a lectern, the affected items turn into ghost items (client-only).

How to reproduce

/give @p lectern{BlockStateTag:{has_book:"true"},BlockEntityTag:{Book:{id:written_book,Count:1b,tag:{author:a,title:a,pages:['{"text":"Click here","clickEvent":{"action":"run_command","value":"/clear @s"}}']}}}}

Place this lectern, access it, then click the text.