There aren't many conclusive studies and literature, but it is said that putting honey in hot water or when heated, loses most of its medicinal properties. Essential enzymes are destroyed. It is also rumored to become toxic. Not that one would suffer adverse effects just after a single consumption, but which would rather accumulate over time. But, lukewarm water is best to mix in the honey.
Just thought of putting it out there. :)
for sure always put the honey inside after your tea is ready, you are right. but to say tpxic is a bit to much mate :)