Hello!
Here's what I have. One bone, one slot, 3 attachment inside.
Problem is, on my timeline, I could have the feeling visibility key 5 and visibility key 10 are the same (yes I don't work with several slots in one bone).
I mean, on my timeline, nothing tells me my first image is hidden, and my 2nd image just appear.
I actually see things on my timeline only when I have a mesh change.
I know you're gonna tell me "hey, just look in the Hierarchy, you'll see."
For now, I've been thinking, but I don't really see some solutions. If someone has an idea...