Display Suite changes disappear, clear cache restores

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I am using Display Suite to add a php button/link to the page for a single content-type. It works great. The title and the custom field (the button) appear as expected.

After some time, less than a day I believe, the title and button are no longer visible.

Checking the content type, the setup for the display has not changed. Clear Cache All fixes the problem...for a day or so.

I would like the Display Suite custom field and the Title to stay in place on the page.

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Your case resembles the problem described in this drupal.org issue. One of the module developers thinks it is mostly related to out of memory exceptions.

A possible solution, described here, is to increase the following PHP settings:

  • memory_limit to 192MB
  • max_input_vars to 2000