projectiles fired through flame wall don't generate energy for cast on ignite

Projectiles fired through flame wall don't generate energy for cast on ignite.
Interestingly, the DoT from the wall itself does count for cast on ignite. Is the tooltip wrong? it says it requires ignites from hits, but only the non hit portion works.

+1 noticed the same issue, my Spark shot through the wall ignites, but doesnt generate any Energy for cast on ignite

Seeing the same thing as well. Would be good to know if this is a bug or not?

+1, same issue, sparks are visibly red, mobs visibly get ignited, cast on ignite only generates energy when enemies walk thrugh the wall.

Is flamewall Dot (without hits) supposed to work with cast on ignite or not? Don't want to make a build that gets nerfed, lot of people doing cast on ignite flamewall.