map runners getting killed with 1% chance

1% chance for my map runners to be killed in maps.
They have all run about 60 maps across the 3 machines today, and I've had 5 killed!
this is very frustrating ggg, im grinding maps just to keep up with the gold required to keep the town running, it doesnt help i have to keep rolling new recruits because they keep getting killed with a 1% chance!!

Number 6 just got killed!!!!! thats another one with a "1% chance to be killed"!!!!!

One died overnight, that makes 7 killed with a 1% chance!!!