Explosions Can And Will Destroy Light Blocks

i was playing a bank robbery map and while blowing up the vault i blew up light blocks so watch the little vid below

 

how to reproduce:

ignite any explosive near a light block

 

expected results light blocks should be unobtainable in survival

 

the vid i recorded was too long let me cut it 

 

FOR THE LORDS SAKE PLEASE EXTEND THE MAX VIDEO BANDWIDTH 10 MEBABYTES TRANSLATES TO 8 SECONDS OF VIDEO