Steps to reproduce:
- Make a multi-line selection in the direction bottom to top so the caret is at the start of the selection.
- Press Ctrl+Del (delete word right = SCI_DELWORDRIGHT).
Expected result: The selection is cleared and the word to the right of the caret is deleted.
Actual result: The selection is not cleared on the other lines, but it does become cleared when those lines are next redrawn.
The same thing happens with SCI_DELWORDLEFT, SCI_DELLINELEFT, SCI_DELLINERIGHT, SCI_LINEDELETE.
The problem doesn't occur if the text is styled.
SciTE 3.4.4 on Windows.