[Metrics UI] Loading saved views in Metrics Explorer results in 2 requests

[simianhacker]

Kibana version:

7.9-BC1

Elasticsearch version:

7.9-BC1

Original install method (e.g. download page, yum, from source, etc.):

Cloud

Describe the bug:

When loading a saved view on the Metrics Explorer, there are two requests sent, one for the previous view and one for the new view. If the previous view takes longer to load than the new view. This creates a race condition where if the first request finished after the second request, the page is left in an unexpected state.

Steps to reproduce:

1. Open Metrics Explorer
2. Open dev console and select network traffic view
3. Delete all the metrics, add system.network.in.bytes to metrics bar
4. Change aggregation to Rate
5. Change "graph per" to host.name, system.network.name
6. Save current view as "Network Interfaces"
7. Load "Default view"
8. You should see two requests. If the first request takes longer then the second request the page will look like the screen shot below

[elasticmachine]

Pinging @elastic/logs-metrics-ui (Team:logs-metrics-ui)