There’s a bug when you use Property Expressions in the Report Designer. Say for example you were using Property Expressions to change the colour of a number of items of text. You would click on some text and then on the button for Property Expressions (which has an incorrect tooltip of ‘Roll, Scale & Skew’!) before entering the text colour e.g. “red” against the FontColor property.
Sometimes (and I can’t pin down the exact sequence of events that causes this to happen), when you click on another text item, the value in the FontColor property from the first item overwrites the value in the new item, without doing anything other than clicking on the item.