NO_BLINK_LEV_IND doesn't seem to work

[classicrocker883]

In file proui/dwin.cpp
line ~640

void _draw_ZOffsetIcon() {
#if HAS_LEVELING
#if NO_BLINK_LEV_IND
static bool _leveling_active = false;
if (_leveling_active != planner.leveling_active) {
_leveling_active = planner.leveling_active;
DWIN_Draw_Rectangle(1, HMI_data.Background_Color, 186, 415, 205, 436);
DWINUI::Draw_Icon(_leveling_active ? ICON_SetZOffset : ICON_Zoffset, 187, 416);
}

what is NO_BLINK_LEV_IND?
this part of the function appears to do nothing.

[mriscoc]

The definition of NO_BLINK_LEV_IND avoid leveling indicator background blinks