Magma Barrier not working with Shield Charge

Magma Barrier reads "When you raise your shield..." and Shield Charge reads "While charging, your Shield is raised..." yet Magma Barrier doesn't work with Shield Charge.

another bug is that it doesnt increase the duration when used with with support gem increased duration, should be increased by +40% but it stays at the 0,5sec

bump that bug
still buggy

bumping too, I can also confirm that adding a cooldown to the gem (with hourglass support for example) will prevent the magma spray to happen, but the endurance charge will still be gain when blocking during the 0.5 second window. And yeah persistence support doesn't do anything as far as I can see.