About caching templates.

[Seductor]

Hello:

I have read this:
https://vborg.vbsupport.ru/showthread.php?t=228078

And it says:

Among the debug info is a list of all templates called, and non-cached templates will show up in red.

I did what it says and I have added a plugin at hook cache_templates for my BESTUSERS template:


I have tried to look if it is cached:


And well, it is not shown up in red, so I think it is cached. But for my surprise, I have checked another templated which I did not cached previously, GLOSTLSIT, and I found this:


It is not shown up in red too! So, how is it possible? How can it be cached If I did not add any plugin to cache_template telling to do it?

Am I doing something wrong?

Thanks in advance.