Hello. I did Wednesday project to Porcshe 911 new model launch. I have issue whit multiple displays - setup was one led screen 2560x640px and two 75" Samsung led 1920x1080px. (MacPro Os 10.14.3) Output to both screen was 1920x1080px. When i active second screen (Samsung) Led screen displays dark line in mapping border.. everything else was ok. Only way to eliminate this was chance display settings to - LED 1080p60hz and Samsung 1080i50hz. all the other combinations did same kind off issue??