[faisalahammad]

The preview paths of acf_rendered_block() and acf_rendered_block_v3() call acf_setup_meta() for post-render validation without a matching acf_reset_meta(). While local meta is active for a post id, ACF_Local_Meta::pre_load_metadata() (includes/local-meta.php:194-203) returns null for any meta name not present in the local set, so unrelated get_field() calls for the same post id silently return null after a block preview render.

This affects three sites in includes/blocks.php:

• acf_rendered_block(), the $form branch (preview edit form)
• acf_rendered_block(), the preloaded preview re-setup after the inner render call
• acf_rendered_block_v3(), the unconditional setup used by v3 block previews

Fix wraps each acf_setup_meta() in a try/finally block with acf_reset_meta( $block['id'] ), matching the existing pair inside the inner acf_render_block() helper. The regression test test_rendered_block_does_not_leak_meta inserts a post with a known DB value, exercises all three preview paths, and asserts get_post_meta() still returns the DB value. The PHPUnit workaround that tracked leaked block ids and reset them manually in tear_down is removed from tests/php/includes/blocks/test-blocks-render.php and tests/php/includes/blocks/test-blocks-auto-inline-editing.php since the fix prevents the leak.

Closes #455

Use of AI Tools

This pull request was prepared with assistance from Claude Code. The change was implemented, tested, and reviewed by hand before submission; the AI was used to find the relevant code paths and run the verification steps outlined in the issue.

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[cbravobernal]

Thanks for the contribution and the effort here! 🙏

A heads-up on how this repo works: a large part of SCF's codebase (field types, Flexible Content, Blocks v3, local fields, forms, value formatting, and most of includes/ and assets/src/js/) is regularly synced from an upstream codebase. Any change we make there, whether a bug fix or a new feature, gets overwritten or causes hard merge conflicts on the next sync. That includes features behind a beta flag. Fixes for those areas arrive through the sync itself, so we can't accept PRs that touch that code, even good ones.