So that means that all the minning that is done by pools right now pointing to wallets 1.3.1, when it will sended from those wallets, to v2 wallets wont be recognised???
1. Newly mined blocks: the pool will not recognise newly mined blocks (the blocks will be orphaned/rejected), so it would not be sent to the user.
2. The amount mined before #198765, but cashed out after #198765: I'm not sure how this transaction will go...