New P2V+. Out doing some flying when all of the suddden birds starts going crazy and plummets to ground from about 40 feet. No control whatsoever but I did notice one prop was static. Crashed. Took top off and found yellow wire came unsoldered, in addition same speed controller was cracked. Has anyone heard of this happening? Also, are all speed controllers the same for all four motors on P2V+? I can't seem to find a part number.