It may interfere with the VPS on the
MA2s 
I know that when I mounted a strobe to the bottom of the Spark years ago, it resulted in a very erratic 30 flight.
It bounced like a pogo stick up and down within twenty feet of launch and had a hard landing in the dark.
Most of the newer Mavics have a landing light on the bottom that assist the aircraft for landing in the dark and may soften the strobe light a bit.
The Spark didn't have that and I think the intense strobing of the light really affected the VPS since it could only "see" the ground every time the strobe flashed. I never had a flight like this before.
I moved the strobe away from the bottom and lit up the landing area with a flashlight. All the flights after that were fine.
It looks like you may have covered the landing light with the strobe?
You might try a piece of cardboard on the front and rear part of the strobe hanging straight down to act as a shade that may help with deflecting the flash from the VPS?
Good luck.
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