"Look up" with offline "Books" error

Hi. I found error with Books app on mac: when you offline and using "Look up" for searching translation after few words it stop working. Dictionary is fully downloaded, and works fine (but like ctrl+c ctrl+v).

Using gestures for Dictionary while you reading too useful for me, but I love reading outside and "internet dependence" makes me frustrated. Please make "Look up" grate again - especially for offline.