No worries kouyo, thanks very much for taking a look at this issue!
I've recorded a scrappy YouTube video capturing this issue on two different monitors:
The monitor on the left is non-HDR, the right is HDR. It might be a bit tough to tell based on an SDR video presumably being watched on an...
I hate to bump up an older post but I wanted to point out that this issue is still present and especially visible on most modern Apple products. I can see the ultra-bright skeleton loading states on iPhone / iPad and other HDR supported displays. Definitely doesn't feel intentional, very curious...