TextEditor drawing bug

General JUCE discussion
1

With setColour(TextEditor::ColourIds::backgroundColourId, Colours::black.withAlpha(1.f) );

With setColour(TextEditor::ColourIds::backgroundColourId, Colours::black.withAlpha(.3f) );

The editor is being updated from a referenced Value.

2

You’ll need to setOpaque (false) if you’re not using a solid background colour.