How to troubleshoot the issue with SIM Handheld Client when it stops acknowledging mouse clicks from ScenarioBuilder during a load test?

After successful 500 concurrent users tests Scenarios stop clicking on images on the handheld emulator. This issue seems to be triggered by the emulator when it is used extensively during the tests. The quick solution is to uninstall the SIM Handheld emulator ( we recommend to reboot the injector to clear the cache ) then reinstall it again.