As being the 'is_tx = 0' can not be moved in the whole handler because of a achievable race involving the delay in switching to STATE_RX_AACK_ON as well as a new interrupt, we introduce an intermediate 'was_tx' boolean only for this purpose. There is no Fixes tag making use of https://caidenlprst.activosblog.com/28121386/an-unbiased-view-of-wordpress-plugin