Post Run action inputs become null

Describe the bug

Post Run action inputs become null.

Happen when workflow file looks like this.

workflow --call--> action --call--> action

To Reproduce
Steps to reproduce the behavior:

1. fork https://github.com/kevinchen-pimq/action-input-poc
2. Run POC workflow

Expected behavior

Inputs value should not be null.

Runner Version and Platform

Version of your runner?

2.308.0

OS of the machine running the runner? OSX/Windows/Linux/...

  Ubuntu
  20.04.6
  LTS

What's not working?

Please include error messages and screenshots.
workflow run:
https://github.com/kevinchen-pimq/action-input-poc/actions/runs/5973798158

Case 1:
workflow --call--> action test-post-run-input
Post run is as expected.

Case 2:
workflow --call--> action extra-step --call--> action test-post-run-input
Post run test-post-run-input inputs become null.

Job Log Output

If applicable, include the relevant part of the job / step log output here. All sensitive information should already be masked out, but please double-check before pasting here.

https://github.com/kevinchen-pimq/action-input-poc/actions/runs/5973798158

Runner and Worker's Diagnostic Logs

If applicable, add relevant diagnostic log information. Logs are located in the runner's _diag folder. The runner logs are prefixed with Runner_ and the worker logs are prefixed with Worker_. Each job run correlates to a worker log. All sensitive information should already be masked out, but please double-check before pasting here.

Run the linked action-input-poc workflow and compare the single-action case with the nested workflow → extra-step → test-post-run-input case. Review the linked workflow run and the runner's Worker_ and Runner_ diagnostic logs to trace when the post-run inputs become null. Done means the reproduced nested case retains the expected input values.