First, make sure you have a fully charged battery in the radio and plane. Weak batteries always cause glitching. Then check the location of the antenna inside the plane. Make sure it isn't too close to the esc or battery. If that doesn't work, try re-routing it to the outside of the plane.

Edit: Also, after making sure you have fully charged batteries in the radio and plane. Perform a radio range check. Have a friend hold the plane while you walk away a specified distance (read manual for specified distance) and check the controls and make sure there is no glitching.