It’s not even shorting it. Imagine if you took a plain battery and tried to charge itself from itself. You’d connect +ve to +ve and -ve to -ve: it’d do nothing.
I think the battery pack does clever things stepping voltages up and down: that’s how it can give charge at the same 5v as it was charged itself. So in this case those circuits will be just burning off energy.
It’s not even shorting it. Imagine if you took a plain battery and tried to charge itself from itself. You’d connect +ve to +ve and -ve to -ve: it’d do nothing.
I think the battery pack does clever things stepping voltages up and down: that’s how it can give charge at the same 5v as it was charged itself. So in this case those circuits will be just burning off energy.