Query workbench is accessible even on a non n1ql node

Steps to Repro:

1) Install  5.0.0-2412  on 4 nodes

2) Create cluster with different services, rebalance and dismantle the cluster such that all the nodes are single node cluster.

3) Go to a kv node which is not part of any cluster and click on query, We see a that it goes to query workbench.

When we try to run a command it fails with "Service n1ql not running on this node"

Attaching logs and UI snapshots.