The net comes off too easily

My son has had his one year. I thought it was great, and quickly took him in the habit of putting toys at the end of the bath to feed a pelican.
But then, it was for barely a month, and the net keeps coming off. The "circle" of plastic that is supposed to keep up comes off, suddenly, everything falls ... I'm very disappointed.

Well, I fixed the problem by attaching the mesh to the support with cotton thread, and since it does not fall over. I'll just loosen when washing it, then tie it again. Baby can again putting toys. :)