The problem has not been fixed as the solution offered, and is still part of the script, has been removed from Quill 2-0.md.

matchVisualremoved - Previously there was a choice between using visual or semantic interpretation of pasted whitespace; now just the semantic interpretation is used. Visual matching was expensive, requiring the DOM renderer which is no longer available in the new clipboard rewrite.

https://github.com/slab/quill/blob/ee827ffb605ba491246f201d497ce0e7d9e193a0/docs/guides/upgrading-to-2-0.md#configuration