The level 13 train camp training have random generator heavily damaged.
I have tried 2 camps in parallel for more than one month (37 tries total) and gain no one 4*
This means that random value is heavily damaged, I assume about 10%-25% but gain less than 1.5% or possible even less!
Comparing the train level 10 effectiveness it is real bug in random generator (1.5% instead of 15%).
This should be solved otherwise this camp level is useless!