Fsesc 75100 current heavily oscillating

Hello Guys, 
I have a problem with my fsesc 75100. Mainly the problem is that the current is heavily pulsing or oscillating (https://www.youtube.com/watch?v=r2a367sdoVw)(https://ibb.co/Y3RY5Rf). Firstly I tried it on 5.3 firmware (https://forum.esk8.news/t/how-to-update-firmware-on-the-flipsky-75100-fo...) but forgot to turn off phase filter (did I blew something??, if yes what?) then on stock 5.2 firmware. Both firmware versions showed the same result. Motor detection runs fine, spins the motor smoothly and returns reasonable parameters. I changed a few foc parameters like O.G. but couldn't affect the current behavior at all. (Is there a certain parameter that I could try changing?). What could be the cause for this? (bad wiring, blown esc or wrong foc parameters?)