Hello,
if no GeoLink feature was enabled and you were unable to stop the model from flying off in the Coaxial mode then yes, this is a big problem. And unfortunately this will also affect all GeoLink features except Altitude Hold.
Here you can see basically same problem with solution:
viewtopic.php?f=20&t=2892The problem was all caused just HobbyWing fan. At the beginning it might work well but with progressing flight it will be failing.
GeoLink features are dependent on correct functionality of the Coaxial/Rescue mode.
If this problem is really occuring in your case then a solution will also fix problems with GeoLink features.
Unfortunately we have over week of rain here so we are unable to make a lot of testing... But we already added few additional safety checks and trying to re-create bad conditions for GeoLink. So that it could solve the problems even if something is not good. But it is like fixing a punctured wheel. Better is to clean a roads from glass shards.
Thank you very much for investigating the issue.