All of a sudden my iPad Pro has gotten neurotic: It spontaneously generates a strange sound---a repetitive thwang-thwang-thwang---. It has always done that to some extent, particularly when I put slight pressure on one corner. I suppose it is a slight short ir open circuit caused by the mechanical stress on the case. But now it has become autonomous. Sometimes it just begins "thwanging" on its own with no human intervention. Has anyone else had this problem and/or knows its cause and remedy? Tnx.