Custom templates in 2012 are not copied during update

[petergekko]

On a regular basis the custom template, in a 2012 theme, is not copied during update. Resulting in broken pages. Adding the template solves the problem

[knutsp]

Hello @petergekko and welcome to Trac!

Updates to themes (and plugins) never copy any additions (or changes) from the old to the new. This is by design, not a defect. If you want custom templates they must reside in a child theme. The child theme is first checked when WP is looking for a template, then the parent theme.

See ​https://developer.wordpress.org/themes/advanced-topics/child-themes/

For further assistance I can recommend the support forums.

[petergekko]

Well, that makes sense. I'll create a child theme