Unkown color code, please advice

[netjam]

I noticed in one particular location back led displays RED/GREEN colour combination, this is occurred after firmware update. H flies fine, however in the other locations as expected purple/white.
The mode is Angle
Can someone please shine a light on it?

 

[PatR]

No GPS, Smart mode.


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[netjam]

According to ST-16 GPS is fine and no warning messages.
Angle mode.
No drifting and very solid flight.

 

[Tuna]

If you run UAV Toolbox, you can check which mode it's in at any point of your flight.