I made changes in the code, but Atom displays the results of the changes the second time, how is it?

Question

atom

For example, I write: displays the number 1 Okay, I write: displays the number 1 as before !! ok, I run it for the second time, now it displays the number 2 from the second time. And it all happens in random order, that is, it’s not clear when this will happen . Am I the only one like this?
print( 1 )
print( 2 )