i was flying and this poped up it went away after a second but does anyone know what it is for i cant find anything about it i have a dji mini 2 buy the way 

i have nd filters on do you think that could be the problemIs it possible that something blocked the sensors for a second?
Detect obstacles ........on a Mini 2 ???????Definitely not . The vision sensors are the small sensors on the front and back of the drone that detect obstacles . ND filters only affect what the camera sees. I've had these messages in flight also , would'nt worry about it
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