i can still hear thunder when i underground（y:11)

At the beginning, I was digging in the ground（y:11） ，then i hear thunder many times even i can hear the sound of lightning hit the tree before i realized that it was raining outside.

Even if I go up to the ground, it is still noise.

I guess that it may caused by that i jumped in mine-pit and make speed so high so the game thinks i still on the ground.