As being the 'is_tx = 0' can not be moved in the entire handler as a consequence of a attainable race involving the delay in switching to STATE_RX_AACK_ON along with a new interrupt, we introduce an intermediate 'was_tx' boolean only for this goal. There's no Fixes tag making use of https://andersongkmno.tinyblogging.com/facts-about-website-design-service-revealed-72368875