---Do they all happen at the same time?

no it doesnt, it happens and when you give it more gas it goes away

---How long will they last from the second it occurs, I assume it only happens during acceleration?

it happens at idle, happens under acceleration and happens downgearing

---Does the voltage keeps at 11v during the whole occurrence of the symptoms?

no it spikes

---Do dealerships check whether it registers any DTC?

doesnt throw any fault codes, checked it twice

--- Does it happen to both manual and auto box?

yes it does