Hello Dam,
I could not reproduce this issue on our end. I have a few questions that will help narrow down what issue it is that you are experiencing.
Quick questions:
- Can you reproduce this issue in a clean project?
- When you say that web browser is removed, do you mean that widget itself was deleted or logic to add it to screen was removed or other?
- Could you give exact method that you used to restart editor?
- Was this project upgraded from an older version of editor?