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I have some simple template suggestions setup in my THEME_preprocess_node() function. Example:

function my_theme_preprocess_node(&$vars) {
  if ($vars['node']->type == 'MY_TYPE' && $vars['view_mode'] == 'MY_VIEW_MODE') {
    $vars['theme_hook_suggestions'][] = 'my__template';
  }
}

Then I have the template file (named my--template.tpl.php) setup in my theme. I cleared the cache, and this is recognized right away and works fine.

Then, after about an hour, if I refresh the page that uses the template, it suddenly is not recognized anymore. I clear cache again and it comes back.

Has anyone experienced this before?

Just FYI, I am using hook_theme() in a custom module to specify the theme for this page based on the URL alias.

  • Do you maybe use themekey, admin_theme or some other theme handler module? – leymannx Mar 26 at 18:14
  • @leymannx No, it's a custom module only handling theme switching. However, I think I have found the issue. I specified the wrong hook name! I had other_theme_preprocess_node instead of my_theme_preprocess_node. I copied the hook from another theme and forgot to change the base. What a rookie move. – Micah Mar 26 at 18:17
  • Just going to wait another hour or so to make sure that was it. Thanks for your response! – Micah Mar 26 at 18:17
  • @leymannx Seems to have done the trick. Thanks again for jumping in. – Micah Mar 26 at 18:58
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Turns out I had the wrong hook specified. I copied this from another theme and forgot to update the hook prefix. So I had:

other_theme_preprocess_node

instead of:

my_theme_preprocess_node

Changing that seems to have resolved the issue.

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