@uyfi It looks like you’re new to WordPress support forums. Welcome.
Sorry, but this is the wrong place to post a possible bug report.
We’ve tested and can’t see this problem. Nobody else has reported the problem. Go to Author Box > Meta > Show Email field and you should see that it hides.
This could be a bug, but it also maybe a misunderstanding or mistake. Please post a support ticket instead so we can help you: https://ww.wp.xz.cn/support/plugin/publishpress-authors/