Hello,
it's not critical bug in functionality, but rather just a little
hard noticeable bug in view.
to reproduce this, previously you have open any browser that later in System Cleaner trigger jv16powertools for showing warning modal window.
proof: https://imgur.com/a/pkxrLQc

It's not a bug, it's a feature that allows you to copy the messages from jv16 PowerTools. For example, if you see a message from the program that you don't understand, you can select that text and copy it, and for example paste it to Google or here for support.