Stage Display lyrics upper case and lower case mix

Hi there
We have just started using the stage display .

Lyrics are appearing in a mix of upper and lower case even though they are all upper case in the software and main audience screen. Why is this?

The original text was likely typed out with uppercase and lowercase letters, and then "transformed" to all uppercase letters. The Stage Display strips any font adjustments made on top of the original written text so the transform setting would have been stripped away.