Nano_33_IOT Serial port monitor inconsistent

Has anyone else seen this behavior with a Nano_33_IOT board? In several sketches that I've tried for a touch screen that I'm trying to get working, Serial.print(..) and Serial.println() don't work, or only some of them show up on the Serial port monitor.

And any suggestions of what to do about it? I've downloaded all the library support packages, etc.

Please post an example sketch that illustrates the problem

I figured it out. Have to wait for native USB serial ports.