Webhook doesn't trigger repos in organization folder

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Jenkins and plugins versions report

Environment

Jenkins: 2.555.3
OS: Linux - 5.14.0-611.49.1.el9_7.x86_64
Java: 21.0.11 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
---
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apache-httpcomponents-client-4-api:4.5.14-269.vfa_2321039a_83
asm-api:9.10.1-216.va_9256d3b_844b_
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basic-branch-build-strategies:317.v85b_331d6cc42
bootstrap5-api:5.3.8-1048.va_c299057e35c
bouncycastle-api:2.30.1.84-291.v9f17b_21896e2
branch-api:2.1280.v0d4e5b_b_460ef
caffeine-api:3.2.3-194.v31a_b_f7a_b_5a_81
checks-api:415.vf022234a_931d
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commons-compress-api:1.28.0-82.v4df6c060eb_66
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git:5.10.1
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github:1.47.0
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gson-api:2.14.0-201.v8eefe5515533
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What Operating System are you using (both controller, and any agents involved in the problem)?

Kubernetes helm chart on linux

Reproduction steps

1. Create a github organization folder (with github-branch-source-plugin)
2. Add webhooks (for push and PR) on some individual repos in this organization
3. Scan organization to setup projects and initial builds
4. Push to a project with webook

Expected Results

I'm not sure if this should be for this plugin or github-branch-source-plugin, but when creating a normal github branch project, webhooks work fine (and we have other such github projects that work with the identical webhook setup), but when the job is created automatically by a github organization folder, the webooks don't work.

Actual Results

The webhook is received (Received PushEvent for...) but no build is triggered.

Anything else?

I think #771 is basically describing the same situation.

Manually adding properties([pipelineTriggers([githubPush])]) in the pipeline definition seems to fix the problem, and builds are then triggered by push events (though I'm not sure PRs work).

Are you interested in contributing a fix?

It seems like triggers are not being added to the Job items created by the organization folder, which I presume is supposed to happen in github-branch-source somewhere, but I'm not actually sure what's going wrong.