Hello.  First post here...I got a Mavic Pro about a week ago, and while it's mostly performing as expected I am experiencing one issue.  When flying in Position mode I can't seem to exceed 10 mph, but I understand that I should be able to get up to 20.  If I disable obstacle avoidance, I can exceed 20 mph.  Also, in Sport mode I can hit the advertised 40 MPH.  So I'm only having a speed problem in P mode with obstacle avoidance enabled.  Things I have confirmed so far:

* Low wind conditions
* Beginner mode disabled
* Multi-flight mode enabled
* Intelligent flight modes not active

Is there anything else to check?  I don't see any other settings that could pertain to speed.

Bonus issue that might be somehow related to the first issue:  When I initiated the RTH, the drone climbed well past the set 30m RTH altitude, would accelerate to about 13 mph, then abruptly stop, repeating this over and over.  It was gaining altitude the whole time.  I had to disable the RTH and fly back manually.

Sounds like you were facing towards the sun.

It is the mavic behaviour to restrict speed if  obstacle avoidance is enabled

If you are flying low or facing the sun it will slow down. Also with mine sometimes it start slow but give it a few seconds it's gone.

The front movement takes a little longer to get going at a fast pace. Like what was previously mentioned, leaving the OA sensors on can reduce forward flight as well.

Just turn off the obstacle avoidance and it will fly faster

Funny how this seems to be the norm here (slow movement in full throttle) but when I mentioned this in my thread it's user error that caused my drone to crash. Yeah  I smell what you're cooking DJI.

I've concluded that I can probably live with the reduced speed in P mode.  I'll just have to get into the habit of switching to Sport mode when at a higher altitude or in transit to my destination.  The RTH issue I experienced however is the thing I find more alarming now.  I was able to reproduce that issue today--the sun was maybe 70 degrees left of center, and the drone did its weird stop/climb routine.  When I performed the RTH with the sun to the back of the drone it worked fine.  Does this mean that RTH can't be relied upon if the sun is anywhere in the direction of the home point?

was shocked when I flew the other day why my mavic was not as responsive as before lol....i thought it was only me

ComCypher Posted at 2017-3-8 20:55
I've concluded that I can probably live with the reduced speed in P mode.  I'll just have to get into the habit of switching to Sport mode when at a higher altitude or in transit to my destination.  The RTH issue I experienced however is the thing I find more alarming now.  I was able to reproduce that issue today--the sun was maybe 70 degrees left of center, and the drone did its weird stop/climb routine.  When I performed the RTH with the sun to the back of the drone it worked fine.  Does this mean that RTH can't be relied upon if the sun is anywhere in the direction of the home point?

Basically yes. It just depends on the angle of the sun to the sensors.
It is just something to be aware of.

Did you remove the clear protectors off of the front sensors?

Grumps Posted at 2017-3-8 21:51
Did you remove the clear protectors off of the front sensors?

That was something I double and triple checked.  I even cleared off a couple specks of dust I saw on the left sensor, but no change in performance.

Something has changed with my speed as well.  things seem to move like a turtle since the latest firmware upgrade!  

I would try calibrating the sensors in the Assistant and if that didn't work I would try downgrading to the previous firmware and then reinstalling the latest. If all that didn't work, I would return it for a refund and then reorder one (I understand that is faster than getting a replacement).