These cannot be termed "bugs"
But whatever the case, report your issues to Xiaomi directly.
The dev don't touch stuff related to how the camera processes images or videos
Welcome to Google's "material you" theming.
This color is usually generated from your wallpaper and is visible on Google apps or apps that support material you theming
If you're rooted, use this magisk module
https://xiaomi.eu/community/threads/22-1-19.64717/post-646760
If not, you'll have to wait for the next release
You can download the latest fastboot rom for your device and extract the recovery.img file
gauguin_images_V12.5.6.0.RJSCNXM_20211025.0000.00_11.0_cn_b523619d80.tgz
Try to read and understand.
Everything has been explained in the link.
Infact the 1st sentence of the post
You can't install the ROM using twrp
The installation will fail if you try to flash in TWRP
It's mentioned in the second post.
If that's not good enough
See more here
https://xiaomi.eu/community/threads/howto-install-fastboot-image-update-info-no-download.64508/#post-643902