Hi Shaggy,
I've done two full drains-recharges since then, and the device seems to work with 1.5 without no problems at all. All the ghosting is gone, and not coming back, even if I leave the device open.
I assume all the weird stuff is related to battery calibration and related code. I suspect that some components of the readers are different, and software updates are causing trouble with some devices like mine.
If it stays as it is, it is at least usable, and that's all I ask.
Kind regards
Seref
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