If there are multiple copies of an input on the graph, when it is renamed, all the connections are broken and rerouted to a single node, orphaning the rest on the graph. I believe this may be a duplicate of [Link Removed]
Before: [Image Removed]
1) Launch AudioQA
2) Create a MetaSound Source
3) Add a Wave Play node (or any node really) to the graph
4) Click and drag off any of the input pins to create an Input
5) Copy and paste that input and the Wave Player node a few times so you have multiples of both pins
6) Rename the Input
All the Input nodes are updated and the connections remain the same
All the connections route to one of the Input nodes and the rest are orphaned on the graph.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-160927 in the post.