Example:

Card1 (5 iterations)
Label1.text [ 1 , 2 , 3 , 4 , 5 ]

Card2 (5 iterations)
Label1.text [ A , B , C , D , E ]

Making card2 to have 1 iteration gives following results

Card1 (5 iterations)
Label1.text [ 1 , , , , ]

Card2 (1 iteration)
Label1.text [ A ]

So the 2 , 3 , 4 , 5 for the Card1.Label1.text are gone. It happens after saving.