So I thought I’d try a night flight in my small town. RTH was set at 45m in optimal mode. I’m on a hill so I flew out over the town for about 500m.AGL was maybe 80-90m. Got some video and hit RTH. Figured it would cruise back at that altitude. Was watching the aircraft lights and noticed the altitude exceeding window pop up. Dang my altitude was now 160m and climbing. Tried to bring it down but it kept going up. Hit 190m, I took it out of RTH, dropped the altitude back to 40m and landed it manually. Tried it again, did the same thing. Changed the RTH to preset. Then behaved normally. Will try it again in daylight tomorrow. Have used RTH many times with this same setting, no problems in daylight. I just did an update. I’m using the RC pro 2 controller.