Not really an 'Idea'. This is a bug and should be corrected ASAP!
When we convert from an Estimate to an Invoice, our bank details are not automatically imported into the Invoice.
This resulted in several invoices going out to our customers without them. The customers had to request our bank details which made us look bad.
Very unhappy with the solution that I have to manually type in these details each time I convert an Estimate!
☹️