MBP almost burning after 3 hours shut down.

Hi,
Just to share a recent and alarming experience with my MBP. And see if someone found a similar behavour.
Yesterday evening I shut my MBP down aroud 18:30 (waited for black screen), placed the laptop on the backpack and around 21:30 at home (three hours later!!!) when taking it out of the backpack I almost burn my hands. It was terribly hot. Imposible to hold it with the hands more than 5 seconds. Burning!
First I thought it had been on inside the bag. But when pressed the power button it started a normal boot. And obviously the fan stared at top revolutions. After boot baterry showed 1 hour remaining. When it was fully charged when left the office.
The case has been reported to Apple but the only sugestion is to observe if it happens again. Sure, I'll observe it very carefully. I don't want any fireworks inside my room or car.
Anyone heard about similar behavour?
Best regards.

Yes, it sounds as a dangerous battery defect. But support asked for the Mod. Number and as it is not in the replacement program, they asume it is not defect.
I have the latest upgrades, firmware and software and I don't observe any problem with time of use. It is in fact better than most of the laptops I user before. Specially 17" screen laptops.
My values look like this:
Capacidad de plena carga (mAh): 6182
Capacidad restante (mAh): 6128
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MBP almost burning after 3 hours shut down.

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