Given that the 'is_tx = 0' can't be moved in the entire handler thanks to a feasible race in between the hold off in switching to STATE_RX_AACK_ON and also a new interrupt, we introduce an intermediate 'was_tx' boolean only for this goal. There isn't a Fixes tag making use of https://lifetime-hosting-service04936.fare-blog.com/28728472/lifetime-hosting-service-can-be-fun-for-anyone