Labels dashboard showing incorrect label usage (no usage) for jobs that use 'This build is parameterized' setting with 'Label' as parameter

Hi, first of all, thank you for this cool plugin.

I have checked that job is parameterized correctly with 'Label' parameter and default-value matching label of existing nodes, but cannot get correct output on Label dashboard window.

Version report

Jenkins and plugins versions report:

Result
Jenkins: 2.277.4
OS: Linux - 4.15.0-135-generic
---
jquery3-api:3.6.0-1
ws-cleanup:0.39
jquery-detached:1.2.1
pipeline-stage-step:2.5
script-security:1.76
apache-httpcomponents-client-4-api:4.5.13-1.0
job-import-plugin:3.4
github:1.33.1
workflow-durable-task-step:2.38
junit:1.49
pipeline-stage-tags-metadata:1.8.4
postbuildscript:2.11.0
font-awesome-api:5.15.2-2
pipeline-input-step:2.12
pam-auth:1.6
jaxb:2.3.0.1
plugin-util-api:2.1.0
pipeline-model-extensions:1.8.4
windows-slaves:1.7
plain-credentials:1.7
popper-api:1.16.1-2
matrix-auth:2.6.6
jackson2-api:2.12.3
trilead-api:1.0.13
jdk-tool:1.5
git-server:1.9
lockable-resources:2.10
timestamper:1.12
workflow-cps-global-lib:2.19
jquery:1.12.4-1
ldap:1.26
branch-api:2.6.2
echarts-api:5.1.0-2
durable-task:1.36
mailer:1.34
pipeline-model-api:1.8.4
okhttp-api:3.14.9
token-macro:2.15
docker-commons:1.17
jjwt-api:0.11.2-9.c8b45b8bb173
build-name-setter:2.1.0
scm-api:2.6.4
bouncycastle-api:2.20
workflow-scm-step:2.12
workflow-step-api:2.23
ssh-credentials:1.18.1
email-ext:2.82
display-url-api:2.3.4
antisamy-markup-formatter:2.1
jobConfigHistory:2.27
pipeline-github-lib:1.0
workflow-job:2.40
jsch:0.1.55.2
matrix-project:1.18
gradle:1.36
envinject-api:1.7
snakeyaml-api:1.27.0
pipeline-build-step:2.13
workflow-support:3.8
github-api:1.123
authentication-tokens:1.4
subversion:2.14.1
git-client:3.7.1
label-linked-jobs:6.0.1
pipeline-milestone-step:1.3.2
workflow-aggregator:2.6
ssh-slaves:1.31.5
workflow-api:2.42
workflow-multibranch:2.23
github-branch-source:2.9.9
build-timeout:1.20
momentjs:1.1.1
credentials:2.3.18
pipeline-rest-api:2.19
workflow-basic-steps:2.23
ant:1.11
envinject:2.3.0
pipeline-graph-analysis:1.10
handlebars:3.0.8
pipeline-stage-view:2.19
disk-usage:0.28
cloudbees-folder:6.15
workflow-cps:2.90
pipeline-model-declarative-agent:1.1.1
checks-api:1.7.0
credentials-binding:1.24
nodelabelparameter:1.8.0
resource-disposer:0.15
docker-workflow:1.26
mapdb-api:1.0.9.0
structs:1.22
command-launcher:1.5
git:4.7.1
ace-editor:1.1
robot:3.0.1
pipeline-model-definition:1.8.4
bootstrap4-api:4.6.0-3

What Operating System are you using (both controller, and any agents involved in the problem)?

Controller - Linux (Ubuntu)
Slaves - Mixed (Win/Linux)

Reproduction steps

You can find screenshots below showing actual result with job and label configured:

Job configuration: job_parameterized_label

Label plugin activated: label_plugin_activation

Labels dashboard: labels_dashboard

Results

Expected result:

Dashboard showing correct job label usage.

Actual result:

Dashboard showing incorrect job label usage (no usage per label).

jenkinsci / label-linked-jobs-plugin