Kerbal Space Program

I see an initial no-zoom period but for me it is only about a half second or so. Since the mouse wheel also affects the manuever controls if you are moused over them, I guess they might be trying to prevent unintentionally messing up the newly created node (maybe turning off the mouse wheel briefly is easier than preventing just the maneuver controls?). I might have done that a few times previously. It looks like the mouse wheel on the maneuver node also doesn't work for that time as best I can tell. I'm not sure why the lockout would last several seconds for you but not for me.