Refund issues

Placing an order via Braintree gateway works well, however if we try to refund it, we get a popup error saying “Error processing refund. Reason: Cannot refund a transaction unless it is settled.”

It appears the payment is not settled yet and i imaging this is the reason for it?
On braintree you can “Void” the transaction.

Few questions
1. Does the plugin support refunds immediately after payment?
2. We have set up the webhook. Should we expect braintree to notify our endpoint when the payment has finalised?
3. Voiding a transaction through braintree, doesn’t update the order status on admin.

Are the above meant to work with this plugin?

thanks in advance