Sunflare goes through triggerCollider even if they're in same layer

i was using some box collider(trigger) to block the sun flare, and it was working as expected.

but after i imported some assets in the project, the trigger collider won't block the sun flare any more, i had to uncheck the trigger to block the sun flare, but that's not what expected to be. i dont know why it gets unconsistent.

the culling mask of the sun was set to everything and the layer of the collider is default.

thanks in advance!