Fire arrows griefing the map (TNT)
Even with "/gamerule mobGriefing false" and "/gamerule doFireTick false", skeletons and wither skeletons with Flame I enchantment on their bows (wither skeletons have fire arrows by default even without enchantments) are able to set off TNT blocks if they happen to hit one. This is direct griefing of the map by a mob, which should be forbidden by the gamerule.
Created Issue:
Fire arrows griefing the map (TNT)
Even with "/gamerule mobGriefing false" and "/gamerule doFireTick false", skeletons and wither skeletons with Flame I enchantment on their bows are able to set off TNT blocks if they happen to hit one. This is direct griefing of the map by a mob, which should be forbidden by the gamerule.
Even with "/gamerule mobGriefing false" and "/gamerule doFireTick false", skeletons and wither skeletons with Flame I enchantment on their bows (wither skeletons have fire arrows by default even without enchantments) are able to set off TNT blocks if they happen to hit one. This is direct griefing of the map by a mob, which should be forbidden by the gamerule.
Nope. This is NOT mob greifing!
While not an official source, the MC Wiki states that "mobGriefing is whether Creepers, Endermen, Ghasts, Withers and Villagers should be able to change blocks or zombies, skeletons, and Zombie Pigmen can pick up items".
Therefore, this works as intended.
Oh, and "doFireTick" only prevents fire from spreading.