Fix LCD throttle issue (MarlinFirmware#18055)

Fixes MarlinFirmware#18044
jmp0x0000 · Aug 7, 2020 · 5811e98 · 5811e98
1 parent 8cff45a
commit 5811e98
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Marlin/src/lcd/ultralcd.cpp b/Marlin/src/lcd/ultralcd.cpp
@@ -881,7 +881,7 @@ void MarlinUI::update() {
     // Instead of tracking changes just redraw the Status Screen once per second.
     if (on_status_screen() && !lcd_status_update_delay--) {
       lcd_status_update_delay = TERN(HAS_GRAPHICAL_LCD, 12, 9);
-      max_display_update_time--;
+      if (max_display_update_time) max_display_update_time--;  // Be sure never go to a very big number
       refresh(LCDVIEW_REDRAW_NOW);
     }