[Regression] Cursor disappears in block selection mode

It seems that there is a regression in QtCreator with block selection.

Steps to reproduce:

• In a file with text (C++ code), start selecting a block of text (Ctrl+Alt+ArrowDown)

Result:
There is no cursor, it disappears, while in earlier versions of QtCreator there was a "vertical line" consisting of cursors.
Note, selection works as expected, the problem is that just cursor disappears.