QFile::isFile() returns false for an ini file name

Given file name:

C:/Application/Ini/Monitor_Log.ini

produces wrong result for QFile::isFile() function. It returns false instead of true even if C:/Application/Ini/ path exists.

QFileInfo::isDir() returns false as well (which is correct in this case):

QFileInfo fi("C:/Application/Ini/Monitor_Log.ini");

if (fi.isFile())... // here returns false - > WRONG

if (fi.isDir())... // here returns *false - > CORRECT