Hello All
This issue is with libwebp-1.3.0. I've taken note that 32-bit RGBA WebP files will create corrupted RGB channels when loaded through the SDK. I had seen that in my own custom importer and thought that it was something I was doing incorrectly. The alpha channel itself may be correct.
However, I was able to replicate it easily with the dwebp.exe test app:
dwebp.exe 1_webp_a.webp -bmp -o 1_webp_a.bmp
The 1_webp_a.webp file is attached to this posting and can also be downloaded from the link on this page: