I just received your PM.
Unfortunately I ended up removing the component from my site as it's not fully compliant with my country requirements on terms of invoicing.
The only thing that could help you on reproducing the bug is that I performed an upgrade from v2.0.9 to v2.1.0 beta 1. I also deleted the contact & client records more than once as well as quotes, invoices and orders while I was testing out the component.
I'm sorry for the inconvenience.