title: WooCommerce not saving post meta value
body: <p>In my WooCommerce site i have create a product and in this product i have attached a lot of pdf files so that after user buy it he can download all these pdf files but the problem is that in this product i have more than 375 files so after added 320 files its working fine and when i add 319 product and hit update button page updated successfully but the 321th products is removed i thought it was some mistake so i added it back and same thing happen i don't know why i just enable the debug log </p>
  
  <pre><code>define( 'WP_DEBUG', true );
  define( 'WP_DEBUG_DISPLAY', true );
  define( 'WP_DEBUG_LOG', true );
  </code></pre>
  
  <p>but noting log no error just removed the 321th record can anyone please tell me is there any limit of woocommerce or anything else o this problem can be resolved </p>
  
  <p>Thanks</p>