NUnit Publisher fails: Remote call on connection failed

### Jenkins and plugins versions report

Environment

```text

Jenkins: 2.303.3
OS: Linux - 4.9.0-7-amd64
Java: 11.0.13 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
---
Office-365-Connector:4.15.2
Parameterized-Remote-Trigger:3.1.5.1
ace-editor:1.1
active-directory:2.25
ansicolor:1.0.0
ant:1.12
antisamy-markup-formatter:2.4
apache-httpcomponents-client-4-api:4.5.13-1.0
artifactory:3.13.2
authentication-tokens:1.4
aws-credentials:1.28.1
aws-java-sdk:1.11.976
aws-java-sdk-cloudformation:1.12.101-300.vc09c7be9cb57
aws-java-sdk-codebuild:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ec2:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ecr:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ecs:1.12.101-300.vc09c7be9cb57
aws-java-sdk-elasticbeanstalk:1.12.101-300.vc09c7be9cb57
aws-java-sdk-iam:1.12.101-300.vc09c7be9cb57
aws-java-sdk-logs:1.12.101-300.vc09c7be9cb57
aws-java-sdk-minimal:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ssm:1.12.101-300.vc09c7be9cb57
azure-credentials:198.vf9c2fdfde55c
azure-sdk:61.v6a8af1f5f5b6
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blueocean-config:1.25.1
blueocean-core-js:1.25.1
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blueocean-display-url:2.4.1
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blueocean-pipeline-editor:1.25.1
blueocean-pipeline-scm-api:1.25.1
blueocean-rest:1.25.1
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blueocean-web:1.25.1
bootstrap4-api:4.6.0-3
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code-coverage-api:2.0.4
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structs:324.va_f5d6774f3a_d
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workflow-api:2.47
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workflow-cps:2633.v6baeedc13805
workflow-cps-global-lib:545.v7b28cce323cf
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workflow-remote-loader:1.5
workflow-scm-step:2.13
workflow-step-api:2.24
workflow-support:3.8
ws-cleanup:0.39

```

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

Linux

### Reproduction steps

Unfortunately it's difficult to reproduce reliably but is happening more often, possibly because the number of Unit tests is growing.

### Expected Results

Tests should be published successfully

### Actual Results

[Publish NUnit test result report ](https://jenkins.local/job/MyProject/job/master/4/execution/node/167/log)(self time 17s)
Recording NUnit tests results
Error in NUnit processing: Remote call on JNLP4-connect connection from 10.9.25.117/10.9.25.117:49694 failed

### Anything else?

Unfortunately I can't provide much more useful information but if you can advise how to get logs or debug information, that would be much appreciated. Thanks

Start with the linked build log for the "Publish NUnit test result report" step and compare it with the reported Jenkins, agent, Java, and nunit-plugin versions. Reproduce or collect the requested logs around the JNLP4 connection failure, then determine what change is needed so NUnit results publish successfully.

Written by the indexing model from the issue text.