I was over a friends house and wanted to show off my MPP they are at a lower elevation than where I live about 900’ lower when I first sent it up I got a message that I was above the 400’ limit? And it was real slow to climb! This lasted about 45 seconds then the message disappeared and it flew normally! Could this have been a GPS glitch? And it thought it was up much higher? I have a 2017 IPad so it’s not the Mobile device being slow! And everything is upto date! I have sent it up at least 2 dozen times since I owned it and never had this happen!