Don't think it's a bug for the reason that after 3 nastronds you might still be on 5-6 seconds of Lotd and sitting on WT or FC at that timing. Botd gives you the option to override the useless Lotd ticks and extend your Botd. Although on the other hand even if you don't get WT FC in before lotd ends you cam still pop Botd if needed later. *shrugs* just personal preference