Background

In the latest master, I've experienced the freeze situation when I launch and close demo web apps 4 or 5 times. It has recently caused, while the jellyfish master incl. Chromium68 has no problem on it.

Test steps

1. Launch the home app with the latest master build incl. Chromium79
2. Touch the demo apps to execute it 4 or 5 times
3. When you try to touch one of the apps, the screen is freezed without any response.