Hi! This is my first post and it's about a strange problem I'm having with my e-bike. I have a 1000w 48v homemade Aliexpress type bike based on a cheap but new mountainbike. It's a direct drive hubmotor in frontwheel. It came with a squarewave controller that made the motor noisy and squeezed out ~1200w. I then bought a sinewave controller that leaves 40 amps (~1800w) and made the bike totally silent, BUT, it now have a strange thing that it makes. When giving full throttle it accelerates like...hell. If I then lowers it tho say half throttle and it's downhill, the motor "brakes" If I keep going like this for awhile it turns off. The regen is turned off. I have changed settings in the kt-3 lcd display to different settings, but it does this. I don't think it did this in the begining. Is the controller faulty? The motor? Is there someone who has experieced the same?