There is no team field in the products module.  It did not seem to make sense.  Was there a specific problem that you are trying to solve with a team field in the products module?

Although it does sound like a bug, it also seems to me that products are no longer intended to be assigned to accounts.  Instead, an invoice gets created against an account and the invoice line items appear in the product list for the account.

However, you are free to customize SplendidCRM to work any way that you want.