Thank you.
I actually just did an experiment in a safe location wherein I put it in sport mode and flew it straight up to see if I could reproduce the error. It went above the ceiling where it had stopped earlier and I let off the stick around 1100 ft. I focused on other stuff for a bit, and then noticed that it was still climbing fast (as if it still thought the stuck was pushed up 100%). It reached the ~1640 ft ceiling before it stopped ascending. I'll study up on what telemetry gets logged and post back if I find anything interesting. I wonder if it simply keeps operating on the last known state of the controls when it loses connectivity. That wouldn't explain the original issue, but it'd be good to know (and it would explain the behavior during my test).
I'm task-loaded right now because I'm a newbie, so I'm probably missing some obvious indicators.
As long as the drone does not go above 400 ft above the ground - you are legal. If you fly straight up from takeoff and go above 400 ft - you are breaking the rules for drone flight. Adjusting the max height is mainly for when you are at a fly point of a mountain and want to climb the mountain with your drone - but keeping it no higher than 400 ft above the ground it is following.
My
Air2 started throwing out warnings at high altitude in Colorado near Mt. Evans, which is approx 14,000+ feet high. I was not at the summit, but over by Echo Lake and once up about 200 ft, got the high altitude warning. Drone still flew fine and would go higher, but that altitude makes the drone work harder, so shorter battery life.
When the drone loses connectivity for more than approx 10 seconds - it's set to auto Return Home (from your take off point or wherever it set the HomePoint on take off - which can be very different). You'll want to make sure YOU know where your RTH / homepoint set is or the drone will return to that spot, not where you took off from if it did not set there. RTH works off GPS and if low GPS at that location, it won't set the RTH / homepoint till it does get enough satellites and in some places - that won't happen at all. Search the forum for ATTI Mode, as you'll experience it sooner than later - esp when no GPS is found with the drone. Then you are flying manually with no stabilization / etc - that GPS gives the drone.
If you have not done your FAA TRUST Test, you should do it soon. It's required of ALL drone pilots. Easy test, but does go over main points / rules like VLOS and other things most newbie pilots don't know about and so they break the law / rules by doing so.
You'll want / need an app like Aloft or B4UFLY to make sure your areas you fly in are legal to do so as well. Many places in Colorado, esp around Denver do not allow drone flight from their properties - esp city / state parks. You can legally fly over said parks by taking off / landing from outside their boundaries if you can do so within VLOS / rules.
Lots of YouTube videos as well. Some good, some bad. Bad ones are the ones where they fly 4 -5 miles downrange and such - which in the US and most countries is illegal. Fly safe & smart to help keep the drone community out of hot water and regulators who want to restrict drones even more than they currently are.