How close was the transmitter to the receiver when this was happening??? were the batteries on your radio fully charged? things like this can happen when the transmitter is sitting right next receiver, especially with fully charged batteries. The transmitter is simply overpowering the receiver and causing it to go crazy. If it doesn't happen after you a few feet away from the plane then you should be ok. But if you are holding the transmitter in one hand and holding the plane as well you could be overpowering it.

Ken