Recently I have noticed an issue while launching my MPP. At takeoff the props start spinning and the drone shakes/vibrates across the plywood launch pad for a second or two and then the drone lifts and appears to fly normally. I checked the propellers and they are connected tightly and don't seem to be damaged. I have not switched out the props with new ones yet but will tomorrow. I have attached a TXT and DAT file of a takeoff and landing. If these files are the correct files can someone review and analyze the data and determine if it is a prop or electrical issue? Additionally, is it possible to determine which prop or motor might be having the issue?