Steps to Reproduce

Create a TextField like this:

var text = "hello";
var controller = new TextEditingController(text: text)
  ..selection = new TextSelection(baseOffset: 0, extentOffset: text.length);
new TextField(
  autofocus: true,
  textAlign: TextAlign.end,
  controller: controller);

This renders a block of text selection at the beginning instead over the characters:

Same for TextAlign.right.

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