Sometimes when I am driving, my car will seem to shift when I come to a stop sign or red light. When I accelerate the RPM will jump up really high and I can't hit the gas without it revving up high. All I have to do to solve this issue is to stop and restart the car. It is happening around 4 to 5 times a week. I had the transmission filter and fluid replaced because I was told that this is probably the issue, but it is still happening. Do you know what this issue may be?