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R52 shutdown-loop

On FW 1.0.3.
Sometimes, not always, after switching R52 the camera off - it shuts down, flashes the red LED on backside, and makes the "shutdown noise" as it should - I guess it is the dust removal etc.
But then it keeps doing this over and over again in a loop.
This happens with various RF lenses mounted, so I do not think it is a lens that confuses the R52.

Removing battery in and out is the only thing that stops this.

I cannot recall that this was an issue earlier.