Dashboard line-chart don't redraw correctly after enabling/disabling metrics

Summary

I've created a custom dashboard, containing a line-chart panel with four metrics. When the chart initially loads, it draws correctly. But, if I toggle the four metrics on or off, it does not redraw the remaining metrics correctly.

Steps to reproduce

1. Create a custom dashboard with four metrics. My dashboard definition is below.
2. Go to the project's Operations > Metrics page.
3. Choose the custom dashboard.

topics.yml

dashboard: 'Kafka Topics'
panel_groups:
  - group: 'Offsets'
    panels:
      - title: Invoice Topics
        type: line-chart
        y_label: Y-Axis
        metrics:
          - id: oi_db_invoice_offset
            query_range: kafka_topic_partition_current_offset{topic="Invoice"}
            label: "Invoice"
            unit: "offset"
            metric_id: 2000
          - id: oi_db_invoice_detail_offset
            query_range: kafka_topic_partition_current_offset{topic="Detail"}
            label: "Detail"
            unit: "offset"
            metric_id: 2001
          - id: oi_db_invoice_coa_coding_offset
            query_range: kafka_topic_partition_current_offset{topic="Coding"}
            label: "Coding"
            unit: "offset"
            metric_id: 2002
          - id: oi_db_oi_action_offset
            query_range: kafka_topic_partition_current_offset{topic="Action"}
            label: "Action"
            unit: "offset"
            metric_id: 2003

Example Project

N/A

What is the current bug behavior?

Line-chart panel does not redraw correctly after the metrics are toggled. Some metrics are missing.

What is the expected correct behavior?

Line-chart panel should draw all active metrics.

Relevant logs and/or screenshots

line-chart-missing-metrics

Output of checks

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Results of GitLab environment info

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System information
System:
Proxy:		no
Current User:	git
Using RVM:	no
Ruby Version:	2.6.3p62
Gem Version:	2.7.9
Bundler Version:1.17.3
Rake Version:	12.3.2
Redis Version:	3.2.12
Git Version:	2.22.0
Sidekiq Version:5.2.7
Go Version:	unknown
GitLab information
Version:	12.3.1-ee
Revision:	699a4525856
Directory:	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:	PostgreSQL
DB Version:	10.9
URL:		https://gitlab.transzap.com
HTTP Clone URL:	https://gitlab.transzap.com/some-group/some-project.git
SSH Clone URL:	ssh://git@gitlab.transzap.com:2222/some-group/some-project.git
Elasticsearch:	no
Geo:		no
Using LDAP:	yes
Using Omniauth:	yes
Omniauth Providers:
GitLab Shell
Version:	10.0.0
Repository storage paths:

• default: /var/opt/gitlab/git-data/repositories GitLab Shell path: /opt/gitlab/embedded/service/gitlab-shell Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

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Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 10.0.0 ? ... OK (10.0.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Reply by email is disabled in config/gitlab.yml
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... Server: ldapmain
LDAP authentication... Success
LDAP users with access to your GitLab server (only showing the first 100 results)
User output sanitized. Found 100 users of 100 limit.
Checking LDAP ... Finished
Checking GitLab App ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
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131/630 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.5.3 ? ... yes (2.6.3)
Git version >= 2.22.0 ? ... yes (2.22.0)
Git user has default SSH configuration? ... yes
Active users: ... 70
Is authorized keys file accessible? ... yes
Elasticsearch version 5.6 - 6.x? ... skipped (elasticsearch is disabled)
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes

Unknown.