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The reason your seeing disagreement is probably because the topic is available but your not actually publishing it consistently. rqt_tf_tree in my experience is more realistic, if you dont see your transforms there, then your robot wont either. I would try

rosnode info hector_mapping

or replace hector_mapping with whatever is supposed to be generating that transform because it likely isn't getting what it needs. Take a look at your publish speeds and frame ids on your odometery sources and make sure they match.