Is Masked Hero Dian's effect bugged?

it's blazeman effect.

Blazeman. I think that was it. I was so busy worrying about his element changing effect that I forgot about THAT one. Thanks!

maybe you used e-hero blazeman's effect, it won't let you special summon monsters

I tried it again. (And I have only used it against LDs in pve.) First time, they set a monster and when I killed it, no effect. Then when they set a monster again the next turn and I killed it, it finally asked if I wanted to activate the effect. I don't understand what changed. I didn't do anything different.

does this happen all the time, or just in a particular situation? i don't think dian can miss timing but there are things that can prevent its effect from activation even when the reqirement is met.the text specifically states "destroys a monster and sends it to the graveyard" meaning that if the destroyed monster is banished dian's effect won't go off (ex: canadia or a self-summoned vamp.retainer). also dian needs to be on the field for the effect to go off so if you destroy a man-eater bug with dian, it will in return destroy dian which will prevent its effect from being activated.(other examples: d.d asilant, wind up juggler, snowman eater ...)

you probably miss timing