Grouped node list missing resources on Compact resources view

[ciiay]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug

On Compact resources view, click into a grouped node to open the resources list sliding panel, observe that length of the list resources sometimes not matching the total amount of the grouped resources when the application is OutOfSync.

To Reproduce

1. Start Argo CD locally and add argoproj project from the live demo. Don't add Ingress to your cluster.
2. Confirm sync failed and toggle on the Group Nodes
3. Click on "click to show details of 9 collapsed ConfigMap
4. Observe that only 7 of the ConfigMap are displayed in the opened sliding panel

Expected behavior

Total amount of resources in the resources list sliding panel should match the number on the grouped node

Screenshots

Version

argocd: v2.0.4+0842d44.dirty
  BuildDate: 2021-06-23T07:11:51Z
  GitCommit: 0842d448107eb1397b251e63ec4d4bc1b4efdd6e
  GitTreeState: dirty
  GoVersion: go1.16.5
  Compiler: gc
  Platform: darwin/amd64
FATA[0000] Argo CD server address unspecified

[ciiay]

I'll make a PR for this issue.