It only accepts a single value so you can't use that usage anymore. No, I won't be providing a fixed file as the fix I proposed was rejected in favor of the above. Providing anything otherwise would be a core hack, sorry. Below would be valid usage.

{cb:[cb:if gids includes "11"]
content
[/cb:if]}

You can try using "or" to match against multiple values. Please see example as follows.

{cb:[cb:if gids includes "11" or gids includes "8" or gids includes "18" or gids includes "26" or gids includes "29" or gids includes "32"]
content
[/cb:if]}