Problem with bottom in LOS

[TurinDM]

The bottom Space doesnt work to cut lines (or to point into an another direction) when you are drawing walls in FG since the 4.5 version.

[Zacchaeus]

I presume that you mean the space bar doesn't add points when drawing line of sight? If so that is correct since the space bar is now used for other purposes. To add a point use either the left click as normal or the keypad + key.