Here’s the problem. I was flying from OMDB to ZGGG in a China Southern 788. Everything was normal until final approach when I disengaged AP and took manual control. The moment I disengaged AP the nose when straight down so I pulled back on my device as much as possible but it seemed like my sensitivity was on the lowest setting because the nose was coming up extremely slowly. In the end I had to turn back in AP and use the vertical speed feature to land. After landing I checked my settings and it turns out the max elevator angle I could go to was 36 degrees. If I pitched my device any steeper the pitch would start to go down again. This explains why I had trouble leveling the plane but the mystery is why my controls were limited to 36 degrees. Like I mentioned before, everything until then was normal. I took off and the controls were working fine. I left the device while I was in cruise and when I came back it was like this. This is also not the first time this has happened. It’s happened on multiple occasions on different aircraft models. I don’t know why this is happening I hope there is a solution. Thanks.
Here’s a photo: