Pixel Errors in Images with Z1 Camera

Hello,

Today I noticed that my Z1 camera has a significant number of pixel errors in HDR mode. There are over 100 small blue, green, and yellow dots scattered across the image. Both lenses are affected equally.

I looked back at some pictures from last year and found pixel errors there as well, but the issue seems to have gotten much worse in the latest images.

The firmware version is 3.30.2.
Is there any way to fix the pixel errors, or is the camera beyond repair?

Best regards,
Kay