Open a new window and drag the window to edge of screen to tile the window to that half the screen.

If the window is newly opened and happened to already be tiled to half the screen (whether this or the other half), it instead gets 'untiled' (reverting to a default size and position, not half the screen).

This only ever happens on the first drag on the window, so is inconsistent and annoying behaviour; it should always tile to half the screen if dragged there IMO (and this is what happens any other time when dragged).

Versions: kwin 5.9.5, Fedora 25