Yep, thought it might be the PHP Error Log alert. Most likely what is happening is that you have some php errors happening constantly and after you click the reset button a new php error has been logged, which makes it appear that the reset is not working, but actually what is happening is the reset worked, but now you have a new php error to reset.
Check the PHP Error Log Last Modified timestamps to confirm that is what is happening.
PHP Error Log Last Modified Time:
Last Modified Time in DB: September 06 2019 15:31:59
Last Modified Time in File: September 06 2019 15:31:59