diff --git a/fhem/FHEM/00_MQTT2_CLIENT.pm b/fhem/FHEM/00_MQTT2_CLIENT.pm
index 30a9eb570..8fa94688e 100644
--- a/fhem/FHEM/00_MQTT2_CLIENT.pm
+++ b/fhem/FHEM/00_MQTT2_CLIENT.pm
@@ -116,6 +116,10 @@ MQTT2_CLIENT_connect($;$)
   if($mc ne -1 && $hash->{nrFailedConnects} >= $mc) {
     Log3 $me, 2, "maxFailedConnects ($mc) reached, no more reconnect attemtps";
     delete($readyfnlist{"$me.".$hash->{DeviceName}}); # Source of retry
+    if("$me.".$hash->{DeviceName} ne $hash->{_readyKey}) { #111959
+      Log3 $me, 2, "RFN ERROR: $me.$hash->{DeviceName} ne $hash->{_readyKey}";
+      delete($readyfnlist{$hash->{_readyKey}});
+    }
     return;
   }
 
diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index 5c30596ed..45ad0568e 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -846,12 +846,14 @@ while (1) {
     next if(!$h);                 # due to rereadcfg / delete
     next if($h->{NEXT_OPEN} && gettimeofday() < $h->{NEXT_OPEN});
 
+    $h->{_readyKey} = $p; # Endless-Loop-Debugging #111959
     if(CallFn($h->{NAME}, "ReadyFn", $h)) {
       if($readyfnlist{$p}) {                    # delete itself inside ReadyFn
         CallFn($h->{NAME}, "ReadFn", $h);
       }
-
     }
+    delete($h->{_readyKey});
+
   }
 
 }