ID 266197 - selecting layer that contains a keyframed shape removes red 'A' animation marker from node in node graph

Problem summary
On a Roto/RotoPaint node, 
selecting the layer (e.g. 'Root') that contains a keyframed shape will remove the red 'A' animation marker from the node in the node graph.  You have to select the shape itself to restore the marker - you can't leave the layer selected or the marker will not be shown on the node

Customer reported version
nuke.10.0v3

Customer reported platform
ubuntu

Steps to reproduce

1)
create a Roto node 

2)
draw a rectangle

3)
in the Roto control panel, select the Root layer

Workaround
Unknown.

Reproduced by support
repro'd on OS 10.10.5
on
Nuke10.5v2
Nuke6.3v7

Expected behaviour
the red 'A' animation marker on the node in the node graph remains, because the node has animation

Actual behaviour
the red 'A' animation marker on the node in the node graph disappears when the layer is selected