Shimano SLX central-lock front disk problem

I've recently found out that when a use my front brake there is some little movement appeared.at first i thought that might be a caliper issue but later on i have discovered where the problem comes from-rivets of the disk are loosened.otherwise the braking stop power is powerful enough,so my questions are - Is Shimano central lock censored or just my? and how long could i ride this way or have to exchange the hub and disk(with bolt on)as well?
thank you very much
thank you very much

Note; The Term "Mountain Bike" Is Incorrectly Used By Marketing People To Sell More Bikes To The General Public.
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