Transparent Buttons Moving

dehleiter8958

We are working with Lectora Online, and recently have found that some users cannot easily click on transparent buttons that we have placed over text, or images, as the buttons seem to move. I have visited one user while he tried to click on a word, and we had to move the cursor all around the screen to 'find' the button. Is there a fix for this. We have tried locking the transparent buttons, but that has not solved the problem.