Renaming a Node Loses Connection In Subgraph

I renamed a View node to have a _V on the end and the subgraph lost the connection between the View node and the next Node.

STG_PARTSUPP_V was called STG_PARTSUPP and was linked to STG_STG_PARTSUPP1 but since the rename it is now not linked.

Refreshing, logging out and in, removing from the subgraph and adding back in do not seem to work. What am I missing please?

Thanks