Given that the 'is_tx = 0' can't be moved in the complete handler due to a probable race amongst the hold off in switching to STATE_RX_AACK_ON as well as a new interrupt, we introduce an intermediate 'was_tx' boolean just for this intent. There isn't any Fixes tag implementing listed here, https://lifetime-hosting30482.ageeksblog.com/28034819/5-essential-elements-for-lifetime-hosting