Whenever I use commands to place lots of TNT and ignite the tnt some tnt will flash black and white instead of white and back to its texture like normal detonating TNT

To Reproduce:

Use the fill command to place lots of tnt (preferably in superflat world)

Then ignite a tnt on the top or on the sides

Observe

What is Expected: Lots of lag but tnt flashes white and back to normal texture consistently before blowing up

What Happens: Lots of lag and istead of the tnt flashing from white to normal texture ike normal tnt it will flash white and black.