Caberg visor: bubbles inside the plastic?

Have a 2004 Caberg Justissimo helmet, still in service, needing a new visor. No scratches, but my current and previous clear visors seem to have ‘self-destructed’—there are numerous tiny bubbles INSIDE the plastic in the viewing area. I am thinking the UV in sunlight might be degrading the plastic. Have you seen this before? Is there just something wrong with Caberg’s visor manufacture? Is it planned obsolescence? I am wondering if it is worth it to replace this visor with another which will have the same issue