403 Forbidden Error with WP_Background_Process When Rank Math SEO Is Active

Hello,

We have a plugin called AI Image Alt Text Generator for WP, which automatically generates image alt text. The plugin includes a Bulk Image Alt Text Generation feature that uses WP_Background_Process.

Everything works perfectly when Rank Math SEO is inactive. However, when Rank Math SEO is active, we encounter a 403 Forbidden error during the bulk action AJAX requests that trigger or cancel the background process.

Specifically, the error occurs at the point of dispatching:

$this->process_generate_bulk_post->push_to_queue($alt_text_attachments[0]);
$this->process_generate_bulk_post->save()->dispatch();

The same issue happens when canceling the background task:

$this->process_generate_bulk_post->cancel();

It seems that WP_Background_Process fails to execute properly only when Rank Math SEO is active.

Please forward this issue to your developer team and help us resolve it.

Best regards,
Ali Hasan
AI Image Alt Text Generator for WP Team

https://imgur.com/a/cLoNMu4