Polar F4 breaking

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Does anyone else have problems with the buttons on the watch breaking? I've had mine for almost two years, last year both buttons on the watch broke and fell off within days of each other. Still under warranty I sent it in and they fixed it no problem.

I've had it back for about six months and one of them recently broke again. My warranty will be up in December, so I am worried about once it's up if it breaks again. It's a huge pain (literally, hurts my thumb) to try working the watch without the buttons, having to push in the little post. I'm not overly rough with it or anything, I don't hit the watch on stuff....

I'm just curious if this happens to anyone else, or any advice on what to do about it....should I request a new watch so I don't have to worry once my warranty is up?