I'm not saying it wasn't discussed I'm saying "flashing items" is a random fanmade rule that doesn't really makes sense.
It sounds similar as nerfing Sharpness to x1.3 or having Trap abilities working only for 3 turns.
It's a duct tape fix that tries hard to add broken content without having any bans in the PVP scene.
Basically what I'm saying is that if we have to do this, then the item shouldn't have been included in the game, or should be banned in Doubles if it is problematic there.
But I mean, after all, if everyone likes it like that then it's cool 😉 To me it's illogical, maybe to you it's beneficial to the game, idk