Test steps:
1. Start the Creator
2. Create a new "Plain C++ Application"
3. In the main.cpp file modify the line 'using namespace std;' to 'using namespace st'
4. Activate the code completion with <ctrl+space> at the end of the line 'using namespace st'
5. Check the suggestions
6. Save the changes and restart the Creator
7. Reopen the project
8. Repeat steps 4-7 until you get different suggestions

Result:
Suggestions vary from time to time(see attachments 1.png and 2.png). Automated test case tst_CSUP06 is randomly failing because of this.