As said I'm still trying to figure out what causes it. It's not that I've accidentally moved the zoom window to the second screen. I've made sure not to do that. I noticed though that if I open the Zoom share window too soon and select the JWlib video to play, it sometimes happens that while waiting for the speaker to okay playing the video during that wait time the JWLib year text reappears on the screen. I've no clue why it does that but it just happens. From the earlier responses to the issue it seems that zoom is the culprit in that it takes control over the second screen. Anyways, when that happens I know I'm in trouble and the only way out is to restart JWlib app and start over with sharing.