Android game LAGS on PORTRAIT but it doesn't lag on LANDSCAPE

My game contains only a couple of rigidbodies and 3 scripts ( lightweight I would say ) but yet it lags , and it does this in a weird way. It only lags on portrait mode , when i rotate the phone to landscape it moves smoothly. I use touch input to do “swipes” in order to add force to the cube to fly up. (the purple line is a swipe render) I have tried to disable everything separately (background obj , scripts , etc ) nothing worked… The lag is constant , there aren’t spikes.

Pictures here

Me too. How can we solve this? :/,Me too