Invalid parameter value [constant_name] for "--%throws" annotation #1033

Hi!
When we modify and recompile test package sometimes we get warnings like this:
"Invalid parameter value "test_blablabla.c_1" for "--%throws" annotation. Parameter ignored."

Provide version info
Information about utPLSQL and Database version,
11.2.0.4.0
11.2.0.4.0

UT_VERSION

v3.1.9.3270
1 row selected.

BANNER

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
PL/SQL Release 11.2.0.4.0 - Production
CORE 11.2.0.4.0 Production
TNS for Linux: Version 11.2.0.4.0 - Production
NLSRTL Version 11.2.0.4.0 - Production

5 rows selected.

PARAMETER

VALUE

NLS_LANGUAGE
AMERICAN

NLS_TERRITORY
CIS

NLS_CURRENCY
р.

NLS_ISO_CURRENCY
CIS

NLS_NUMERIC_CHARACTERS
,

NLS_CALENDAR
GREGORIAN

NLS_DATE_FORMAT

PARAMETER

VALUE

DD.MM.RR

NLS_DATE_LANGUAGE
AMERICAN

NLS_SORT
BINARY

NLS_TIME_FORMAT
HH24:MI:SSXFF

NLS_TIMESTAMP_FORMAT
DD.MM.RR HH24:MI:SSXFF

NLS_TIME_TZ_FORMAT
HH24:MI:SSXFF TZR

NLS_TIMESTAMP_TZ_FORMAT
DD.MM.RR HH24:MI:SSXFF TZR

PARAMETER

VALUE

NLS_DUAL_CURRENCY
р.

NLS_COMP
BINARY

NLS_LENGTH_SEMANTICS
BYTE

NLS_NCHAR_CONV_EXCP
FALSE

17 rows selected.

PORT_STRING

x86_64/Linux 2.4.xx
1 row selected.

Information about client software
TOAD

To Reproduce
add new test in the package (an error does not always occur )
Expected behavior
Tests are working without warnings

Example code
example of package specification:
"create or replace package test_balablabla is
c_1 number := pkg_errors.get_exception_code('err_1_name');
c_2 number := pkg_errors.get_exception_code('err_2_name');
c_n number := pkg_errors.get_exception_code('err_n_name');

-- %suite(blabla)

-- %test
-- %throws(test_balablabla.c_1)
procedure precheck_something;

end;"