Hmmm what are you running because I just went into FL and automated six things without a problem or a delay at all? I also signed in over on Image Line and did not see it as a reported problem from users. I also forwarded the link to a friend who runs a studio down in California to test this out and it worked fine for him as well.
Are you running 10 or some older version? If you are running 10 I would make sure you have the latest update. The latest version is 10.5 which if I remember right came out in April. So I would do that and see if that helps.
Do you have other things running that may cause FL to have a conflict?
Lastly, what are the specs on the machine that you are running this on?
IDK something is wrong here, but it is not an issue with FL Studio doing this trick in and of itself, so I think we need to look closer at your isolated situation.