New Typhoon H owner here. If this isn't one way to get a guy make an actual pre-flight check list - I discovered that if you don't take off the protective camera cover, response to commands is slowed and/or blocked. Never saw that anywhere, don't know if it's atypical, but the ONLY thing that finally worked normally and correctly was RTH. Lesson learned, luckily not the hard way ($). Removed the cover, re-started and normal operations the rest of the morning.