Missing account.invoice.payment.method company rule
In account.invoice.payment.method model has company field and relate to account (account by company).
Missing company rule that filter all payment methods by company.
[1] https://bitbucket.org/tryton/account_invoice/src/ba6567bf8e48ac96e3dc6dc9d3b134041a8884ac/invoice.xml#lines-319
[2] https://bitbucket.org/tryton/account_invoice/src/ba6567bf8e48ac96e3dc6dc9d3b134041a8884ac/invoice.py#lines-2377