Chunking seems to not be working properly

Hello and thank you for creating this tool!

I have been trying to use the noun_chunks with your pipelines but it does not seem to be working correctly. I have tried with _en_core_sci_sm_, _en_core_sci_md_ and _en_core_sci_lg_. For example when I input the sentence "CCR5(+) and CXCR3(+) T cells are increased in multiple sclerosis and their ligands MIP-1alpha and IP-10 are expressed in demyelinating brain lesions." I only get "CCR5(+", "CXCR3(+" and "T cells" as chunks and I would expect more chunks. For example, using spaCys _en_core_web_trf_ I get "CCR5(+) and CXCR3(+) T cells", "multiple sclerosis", "their ligands", "MIP-1alpha", "IP-10" and "brain lesions".

Is the chunking supposed to work in a similar way as spaCys pipelines or have I misinterpreted something?

Thank you in advance!

Best regards