Given that the 'is_tx = 0' can not be moved in the whole handler as a consequence of a doable race concerning the hold off in switching to STATE_RX_AACK_ON plus a new interrupt, we introduce an intermediate 'was_tx' boolean just for this function. There is no Fixes tag implementing below, https://zanderyanrs.blogdanica.com/28537052/a-simple-key-for-wordpress-and-plugins-unveiled