\ref is unable to resolve references to fields in the documented struct

[arwedus]

Describe the bug
Describe what you see that (you think) is wrong.

The following code:

/// \brief Date and Time Record.
/// Represent a specific point in time.
/// \invariant \ref date and \ref day_of_the_week must not be set together.
struct DateTimeRecord
{
    /// \brief Minutes after start of the day. Valid range: 0 (00:00) to 1439 (23:59) (inclusive)
    std::optional<Int32> minutes_after_midnight;
    /// \brief This value is only set if \ref day_of_the_week has no value.
    std::optional<DateRecord> date;
    /// \brief This value is only set if \ref date has no value.
    std::optional<WeekDay> day_of_the_week;
};

results in the following doxygen warnings:

Generating Sqlite3 output for class example::sit::DateRecord
Generating Sqlite3 output for class example::sit::DateTimeRecord
/workspace/build/ref_example/example.h:55: warning: unable to resolve reference to 'date' for \ref command
/workspace/build/ref_example/example.h:55: warning: unable to resolve reference to 'day_of_the_week' for \ref command
Generating Sqlite3 output for class example::sit::TimeRestrictionRecord

NOTE: This warning is only issued when writing the Sqlite3 output.
When you set GENERATE_SQLITE3 = NO (default), the warning is not shown by doxygen build.
The references get correctly resolved in the HTML output, no matter how GENERATE_SQLITE3 is set.

NOTE: The same is true for the \copybrief or \copydetails commands:

Generating Sqlite3 output for class example::sit::DateTimeRecord
/workspace/build/ref_example/example.h:54: warning: @copydetails or @copydoc target 'minutes_after_midnight' not found
/workspace/build/ref_example/example.h:55: warning: unable to resolve reference to 'date' for \ref command
/workspace/build/ref_example/example.h:55: warning: unable to resolve reference to 'day_of_the_week' for \ref command

To Reproduce

See attached example:
ref_example.zip

Expected behavior
Describe what you would have expected or think is correct.

The warning should not be issued when GENERATE_SQLITE3 = YES

Version

doxygen: I've tested 1.10 and 1.12 (built from source)
OS: Ubuntu 20.04

[albert-github]

I've just pushed a proposed patch, pull request #11185

[albert-github]

Code has been integrated in master on GitHub (please don't close the issue as this will be done at the moment of an official release).

[doxygen]

This issue was previously marked 'fixed but not released',
which means it should be fixed in doxygen version 1.13.0.
Please verify if this is indeed the case. Reopen the
issue if you think it is not fixed and please include any additional information
that you think can be relevant (preferably in the form of a self-contained example).