Verisium Ore dont spawn on map lower T17

I ran more than 30 T16 maps, the Verisium Ore was not spawn. People say that it often appears on T17, should it be like this?

It is the rarest of the ores and I've gotten it a lot in T16 maps. 30 maps isn't enough of a sample size.

30 times is not enough and at the same time you say that you often found her? a strange statement

Yes, because I've run hundreds of T16 maps this league already. I only completed one T17 map for challenge so I have no reference for how often they spawn there. But I've found dozens of spawns all in T16 maps.

I cannot comment on other maps, but I only run Jungle Valley and Toxic sewers for the last several days so if other maps are potentially bugged, I would not know. But I definitely have had spawns in both maps.. as I frequently die to fully charging them and spawning 1-2 juiced up uniques. One had enough AoE to hit me from 1.5 screens away.