Yo,
I am on the latest internal version for us devs and I see the icon in the Vassals list:
It might be a bug in your version that hopefully disappear, but if it this issue remains after the next major release (All under Heaven) then I'd suggest making a bug report!
I am on the latest internal version for us devs and I see the icon in the Vassals list:

It might be a bug in your version that hopefully disappear, but if it this issue remains after the next major release (All under Heaven) then I'd suggest making a bug report!
- 2