Entidade TNT parada no tempo

After blowing up a large amount of TNT, I left the world because it was causing issues on my PC. When I returned, the explosion was still ongoing, but a large number of lit TNT blocks were frozen on the ground like entities. I left and re-entered the world two more times, and the same thing happened to the subsequent TNT blocks. At the end of the explosion, after most of the TNT had detonated, there were many time-frozen TNT entities scattered throughout my world. (I'm not sure, but I believe this also happens when the game is paused.)

Sorry for my English, but that's not my language.