diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index a693ad47b9..2cd8e52af1 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -1502,7 +1502,7 @@ sub pause_background_process {
         return 1;
     } elsif (defined $self->{apply_config_timer} && $self->{apply_config_timer}->IsRunning) {
         $self->{apply_config_timer}->Stop;
-        return 1;
+        return 0;  # we didn't actually pause any running thread; need to reschedule
     }
     
     return 0;