If this is the original Ford OEM battery, get the battery checked with a load tester. Low voltage conditions can cause weird things on the newer vehicles. It seems the modules are turning off and experiencing low voltage conditions, which can erase memory presets, etc.
Also, this should be an AGM battery as equipped by Ford. DO NOT install a normal SLA in this vehicle.
See how the truck acts for a week. If it does the same thing, replace the battery. The symptoms are consistent with a battery cell deterioration. This will happen with temperature changes, especially after it runs for a while in the evening and then is shut down on a cold night. And in Sweden, I think you have cold nights?
I am hoping that having the battery disconnected and charged will reset the settings when the battery is reconnected. Sounds like a MyKey setting if the speed is limited to 130km/h. You will know when you reconnect it.
Did you update with the engine running?
And also, a general question: if the battery is bad, shouldn’t the alternator cover for that while the engine is running?.
Or if some modules got a drop of voltage they would go offline until BMS is reset or something like that?.
I assume that would trigger some DTCs, right?
Yes. BMS forces the modules offline and once the vehicle resumes proper voltage (running) the modules come back online. The issue is that if they have presets, etc., that could be erased, they might just be erased, or the module set back to factory. In certain modules it will trigger DTC’s that do not illuminate the MIL.