Bug/fix rucss job crash due to cast

[CrochetFeve0251]

Description

Fix an error on rucss due to a casting error on trunk.

Type of change

• Bug fix (non-breaking change which fixes an issue).

Checklists

Generic development checklist

• My code follows the style guidelines of this project, with adapted comments and without new warnings.
• I have added unit and integration tests that prove my fix is effective or that my feature works.
• The CI passes locally with my changes (including unit tests, integration tests, linter).
• Any dependent changes have been merged and published in downstream modules.
• If applicable, I have made corresponding changes to the documentation. Provide a link to the documentation.

Test summary

• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I validated all Acceptance Criteria of the related issues. (If applicable, provide proof).
• I validated all test plan the QA Review asked me to.

If not, detail what you could not test.

Please describe any additional tests you performed.

[vmanthos]

It wasn't possible to reproduce the issue with 3.15.2 or 3.15.3.

Tested the PR for regressions, and everything is working fine. 👍