It's not the same issue. In this case, it's a logic error: 1. Event A is read into a buffer. 2. Event B is read into the same buffer. 3. Event B is processed

It's not the same issue. In this case, it's a logic error: 1. Event A is read into a buffer. 2. Event B is read into the same buffer. 3. Event B is processed. 4. Event A is processed. So, when (4) happens, its buffer from (1) has been clobbered.