Trying to use the __has_include preprocessor command immediately after an #if, #else, #endif block in the same file results in a "Preprocessor Error - Invalid File Name(empty filename)" erorr.

This doesn't seem to occur when the #if block immediately above the __has_include command does not have an #else entry. It doesn't seem to matter if any #if blocks earlier in the file have an #else entry, as long as the block immediately before the __has_include does not.

Here are some examples from a description.ext file (in this case, searching for a file from the ACE3 mod):
This code block seems to work without issue.

#define TESTDEFINE 1

#ifdef TESTDEFINE
    first_mission_value = 1;
#else
    first_mission_value = 0;
#endif

#ifdef TESTDEFINE
    second_mission_value = 1;
#endif

#if __has_include("\z\ace\addons\main\script_component.hpp")
    ace3_value = 1;
#endif

This code block results in a "Preprocessor Error - Invalid File Name(empty filename)" error

#define TESTDEFINE 1

#ifdef TESTDEFINE
    second_mission_value = 1;
#endif

#ifdef TESTDEFINE
    first_mission_value = 1;
#else
    first_mission_value = 0;
#endif

#if __has_include("\z\ace\addons\main\script_component.hpp")
    ace3_value = 1;
#endif