I don’t know, but I see what you are saying. If that happens then the saying “Energy cannot be created...” to be false.
Nuclear reactions convert mass to energy, they don’t create energy out of nothing.
It happens. Nuclear explosions.
E=MC2
A little mass is a lot of energy.
http://www.chem.purdue.edu/gchelp/howtosolveit/Nuclear/nuclear_binding_energy.htm