Randomization may be off

Flakricket

Good morning
I am wondering about the randomization of large buys. I bought 40 from the taco vault today and 9 of my 40 were health, 5 of which came consequently. I also received 4 or 5 ms marvel, and 3 she-hulk. I think the randomization generator is off as there were so many repeats and they are all clumped together on the wall. Could you please look into this. Thanks much.