We have our first bug report about this! https://www.mediawiki.org/wiki/Topic:Vcr5pdq2c45docll

After updating from version "20e26df" to the above mentioned version I noticed that it is not possible to paste text in the cite input box. After spending much time trying to update parsoid and visualeditor, I found out that downgrading Cite fixes the problem.

We've decided that the initial release of Book Referencing won't have any new VisualEditor logic to edit or render subreferences

This feels like something that needs to be discussed between Release Engineering and the Editing and WMDE teams; would @JStrodt_WMDE be the best person from WMDE for product/rollout decisions?

@Jdforrester-WMF we don't currently have a product manager—we expect a new hire to start in January. But in the meantime, perhaps our engineering manager @Tobi_WMDE_SW can coordinate this. It would be great to discuss, and collaboratively decide on the next steps. We've roadmapped that our team will implement Book Referencing over the next six months, but we can be flexible in the details, which features are deployed first, and so on.