Kia Seltos Arizona wavy patterns bumper

2023 Kia Seltos in Arizona. The rear bumper trim has turned gray/white with these strange wavy patterns. The vehicle spends a lot of time in the sun, but this doesn't look like normal fading to me. Has anyone seen this before? Is it UV damage, chemical staining, or a defective trim piece? Any recommendations for restoring it or pursuing warranty coverage?

https://preview.redd.it/ufko4dq0be5h1.jpg?width=2048&format=pjpg&auto=webp&s=9b874fca9bd215e8def75adc69330a8077b73810

https://preview.redd.it/qpnvqdq0be5h1.jpg?width=2048&format=pjpg&auto=webp&s=72306ccaa61873681a346ab473e72f4e187fde2f

https://preview.redd.it/iq71sfq0be5h1.jpg?width=1024&format=pjpg&auto=webp&s=1f1c0cf164dc961583123af26b573bb55b066ad0

https://preview.redd.it/ljyj2iq0be5h1.jpg?width=2048&format=pjpg&auto=webp&s=7b03409dbb83580f6d4b0bc7936f25d8b54ede2a

https://preview.redd.it/1ds9aiq0be5h1.jpg?width=2048&format=pjpg&auto=webp&s=7329542dd1ecbc62bd2dc3ed40aa395f46be8d7e