I have a similar problem to what is described in this thread, strange change in commanded afr during idle, where the commanded EQ changes during idle after warm up for ~6 seconds, but it only goes lean for me and seems to happen more than once per ignition cycle. The engine seems like it wants to die when it happens and the whole car surges and shakes when it happens. I've captured it in a log and attached screenshots below. Not sure if its some sort of cat test or what, I have all cat tests that I could find disabled in the tune.
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