This certainly happens to me on Windows, not confirmed on other platforms.
When a program crashes a dialogue window pops up with an "Ok" button to dismiss. If I click "Ok" but the program is still crashing then the same dialogue will immediate pop back open.
This prevents me from closing mGBA, the only way to close mGBA is to open Task Manager and end the process manually.
This certainly happens to me on Windows, not confirmed on other platforms.
When a program crashes a dialogue window pops up with an "Ok" button to dismiss. If I click "Ok" but the program is still crashing then the same dialogue will immediate pop back open.
This prevents me from closing mGBA, the only way to close mGBA is to open Task Manager and end the process manually.