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Sounds like a power module with multiple systems being affected. Not sure where to steer you. Could be something as simple as loose or corroded connections or bad solder joints on a circuit board especially since it's heat affected.

I believe this module( EMS) within the engine fuse box could be one that can play up. It does in other models especially push to start.
If it's not a separate module let me know, I'm having trouble finding the poart plus I know you hav epetrol but which? 2.4 and region?

There may be others but the fuse box has connectors underneath that harnesses connect to. Any of these points could be a point of failure.

Circuit component Hardware programmer Passive circuit component Gadget Electronic component
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