I want to see how many other Devs out there have had this problem with construct 2.
You'll have something work like a bullet flying though air.
You'll work on something that doesn't have anything to do with the bullet.
Once you preview the bullet is standing still.
You check the code but everything looks good.
You save and Close then Reopen Construct 2 and Everything is Fine without you changing anything.
I can't tell you how many times this has actually worked for me and it's something that's caused me Hours/Days of stress. I honestly don't know why Construct 2 sometimes just doesn't work like it's supposed to.