diff --git a/AutoMark/scripts/mods/AutoMark/AutoMark.lua b/AutoMark/scripts/mods/AutoMark/AutoMark.lua
index d2f2f56..be94b13 100644
--- a/AutoMark/scripts/mods/AutoMark/AutoMark.lua
+++ b/AutoMark/scripts/mods/AutoMark/AutoMark.lua
@@ -359,6 +359,7 @@ mod.on_game_state_changed     = function(status, state_name)
     if state_name == "GameplayStateRun" then
         if status == "enter" then
             mod:check_game_mode()
+            mod.debug_warn_pending = true
             -- game settings cache
             mod:init_game_settings()
             -- display
@@ -716,6 +717,12 @@ mod:hook_safe(CLASS.PlayerUnitSmartTargetingExtension, "fixed_update",
             local game_mode_manager = Managers.state.game_mode
             mod:diag(string.format("OMNI-GATES class=%s companion=%s skull=%s mode=%s valid=%s toggle=%s debug=%s", tostring(context.class_name), tostring(context.has_companion), tostring(context.has_servo_skull), game_mode_manager and tostring(game_mode_manager:game_mode_name()) or "nil", tostring(context.game_mode_valid), tostring(mod_settings.toggle_mod), tostring(mod_settings.debug_mode)))
         end
+        if mod.debug_warn_pending and context.game_mode_valid then
+            mod.debug_warn_pending = false
+            if mod_settings.toggle_mod and mod_settings.debug_mode then
+                mod:notify("AutoMark DEBUG MODE is ON: file diagnostics in mods/AutoMark/diag_log.txt keep growing - turn it off when you are done!")
+            end
+        end
         if mod_settings.toggle_mod and context.game_mode_valid then
             mod.num_visibility_checks_this_frame = 0
             clean_expired_units(t)