Merge pull request #6396 from nextcloud/backport/6393/stable-3.12

[stable-3.12] Bugfix. Random crash in LsColJob after recent changes.

src/libsync/networkjobs.cpp

@@ -423,7 +423,8 @@ bool LsColJob::finished()
 
     this->deleteLater();
 
-    return true;
+    // fix crash on random deletion mess in the parent class, we never discard this job but always delete it inside this method
+    return false;
 }
 
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