Velocity templates' macros are not interpreted

Confluence Development Confluence Data Center
1

In Confluence, in XWork actions, we use Velocity templates.

However, in some circumstances, the macros are not interpreted.

Example 1

Even the #requireResource() is not interpreted!

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Example 2

I include a file in my XWork action:

#parse("/actions/mvc.vm")
#DONT_DISPLAY("Some text")

The file defines a macro named #DONT_DISPLAY, which does nothing, and certainly not displays the parameter. But when we display the page in Confluence, it displays it. The rendering is:

#DONT_DISPLAY("Some text") <-- This is what is really printed into the HTML page.

Does anyone have an idea about why the #parse() or the #macro() instructions have no effect?