When you have multiple stacks with services that are labelled the same (i.e. web or db), it is difficult to identify which service you want to link to from the UI, since it only displays the service’s name, but not the stack it belongs to.
One could label services like stack-service but that doesn’t seem like a good practice.
The pulldown could display something like:
stack1 > web
stack1 > db
stack2 > web
stack2 > redis
Note: this also applies to the Classic UI