Not taking pictures during mission

Wow, super fast response! Yes, I upgraded the firmware two days ago to no avail. 

Is the camera preview available?

Yeah, the camera preview works even during the mission.

Can you tap with two fingers towards the top of the preview window and have it take a picture? 

Have you tried a full system power cycle including the iOS device? 

You can enable the extra debug messages by pressing and holding the top status bar of the app until a new pop window shows up. This will enable extra error messages. Are any being thrown?

Please make sure you are using an SD card that worked previously and try formatting it to make sure there are no issues there.

I've used this SD card before, it's worked fine. I tried a full system reboot, and also deleting then redownloading the app, but neither of those worked. 

I will try the other two suggestions when it stops raining...

Thank you very much.

DJI Go is closed too, right?

Yes. To make sure the apps don't interfere with each other I have them installed on separate devices. The one with DJI GO is turned off. 

So I'm able to take pictures by tapping with two fingers. When I opened the debug window, everything magically worked... for the first row. As the drone was turning to begin the second row, I got a message saying "Camera still busy, you might need a slower SD card" or something along those lines. I went and got another SD card that's worked in the past, but then nothing again. 

That error is "Camera is still busy. You might need a slower SD card setting if this message is frequent."

That means you might need to turn your SD card speed down in the Map Pilot settings because it is currently trying to write images too quickly for that card. This setting can go as high as 1 image every 2 seconds to one every 3 seconds.

It could be that you just have it set too fast. That would explain some of what you are seeing.

Making sure the card is properly formatted will rule out that issue as well. The fuller the card gets the slower it will respond sometimes.

They're both U3-class SD cards, but I'll reformat the SD card and try it again with the slowest setting and see what happens. 

We had another customer who had their camera "go slow" on them. No idea why. He ended up sending it in to DJI.

We haven't had any other complaints along these lines.

Please verify that your camera can write images at a sustained 2 second interval by using the intervalometer setting on the DJI Go app. Even if that works it still might be an issue with something in your hardware and the new SDK. 

I reformatted both SD cards and set Map Pilot to the slowest setting, but still nothing. I don't think it's the camera, because the drone insists on going the full 15 m/s while its on the route, but only averages 6 m/s when its going away from/returning to home. I can also take pictures at <2 second intervals manually, and the DJI Go tool confirms that it is capable of writing at those speeds.

The problems began right as I updated the app to 1.5

The app update and the firmware update both occurred at the same time so it is pretty hard to say which is the cause. Our app update had a new release of the DJI SDK in it too so there were a lot of changes.

We do a LOT of testing before any release and have not heard of this going on with anyone else yet. 

Please email some of the log files from the offending flights to mapping@dronesmadeeasy.com so we can take a look at them.