Consistent cylinder misfire

I have a 2012 prius 2 that since day one has had a misfire issue that both toyota and myself cannot figure out.
Some backround info; it only does this during and throughout winter months
It happens at random after sitting overnight and getting cold, though not every time
Toyota has replaced the intake manifold and gasket per a factory tech bulletin, misfire continued
I have replaced all spark plugs with factory Denso plugs and it continues.
I have ran heet and sea foam through system to attempt to both clear out water and clean injectors
I also use only 91 octane or higher fuel in the car
Originally the OBD system read misfire cylinder 1 today it did it again only now the scanner says pending misfire cylinder 3 and 4, and random misfire detected.
Originally when the scanner was reading misfire cylinder 1 i swapped around ignition coils from cyl 1 and 2 and since then the last sentence is what has recently happened.

Toyota has been no help and I am just tired of the problem, please if someone can help me I would greatly appreciate it.

 

No wires on it, coil for each cylinder

Couldnt lemon law it because toyota stopped making attempts once they couldnt get it, and I needed them to make 2 more before I could even try that

 

The conditions are always that the temp is below 30 degrees and the car has sat outside all night
The condition never occurs in warmer weather, but to that point it also doesnt occur every time i leave it out
No current discernable pattern but i was able to somewhat change the condition slightly when i moved the coil packs between cyl 1 and 2.
Originally it only misfired on cylinder 1 but after i moved the coil packs it changed to random and cyl 3 and 4
I thought maybe the coil but it didnt stay with the pack from cyl 1 and in my experience if a coil is going it will usually follow that coil and remain somewhat constant. I could be mis interpretting that though

 

I have used all types of fuel both regular (87) and high octane (91 to 93) amd both no ethanol and a max of 10% ethanol blends, no change
I have also gone to different places/companies for fuel and no change. I store it both in a garage when i am home and it sits outside at my job in an open lot and it hasnt shown to make a difference. I do my best to keep the tank full during winter months to avoid fuel line freeze up.
I have tried running heet and sea foam through it to eliminate that possibility the best i could. I should add that this only happens on startup not at any other time. If i shut it down while it is misfiring and start it again it does stop misfiring at that moment.

 

I did log a complaint with toyota USA as soon as the dealer said it was fixed after they replaced the intake manifold. I will visit that again
When the event occurs that it logs a misfire the entire vehicle shakes which is what toyota says was the symptom of the previous manifold.
I have changed the plugs and thoroughly gone through the coil pack connections and harness. I have also checked all injector connections and resistences of their coil.
That doesnt rule out a sticking injector though

 

VVT system issue?

 

The thing though is it misfires at the first start. If i immediatly shut it down and restart it the misfire is gone. But that unburned fuel statement makes me wonder if one injector could be leaking raw fuel during the off time of the car. Though the pressure drops there is still fuel on the rail. I wonder if that is making its way onto the valves from an injector leaking by