Credit card repayment in full
Some banks issue credit cards that just get automatically repaid in full from the main bank account. This should be a thing to be visible in the planned transactions automatically - for example my credit card typically resets on the 17th of every month. And then at about 22nd of every month a widthdrawal hits my main bank account in the amount of the money owned on the credit card at the point of reset.
This also shows the need for pending transaction halves - the transfer on the credit card side is booked on the 17 and all balances after that reflect this. But on the main account it only gets booked on the 22th. If you book transfers to both accounts at the same date/time then one of the accounts will show wrong balance for the intermediate days and will amke it much harder to reconsile.