Operating system: Win 10 64 bit
Graphics card: 2xGTX 1080Ti
2.80, 2018-12-04, be91d4ef957
Short description of error
While render animation, focus is going out of track.
Exact steps for others to reproduce the error
It happens in 1200 frame animation - about 560 frame. Camera is moving backward, object is moving forward. I have locked focus on object and around frame 560 it was going step by step out of focus. After I cancel further render and start render again it was back on track.