Bug? Zombie junctions

Observed on NR 3.0.2 and 3.1.0 beta 2.
Is this real or just odd behaviour of my PC?

1 Create a group of nodes which includes some junctions. Deploy.

2 Delete some of the junctions. Deploy.

3 Copy and paste the group. The deleted junctions are included in the new group.

Looks like a bug to me. Would you mind raising an issue on the GH repository please?

123 Done.