I use Video Codec SDK 9.1 to decode H265 video. The size of this video is 5600x5600. This video uses 3 tiles.
You can see an error in the picture.
If you use other decoders, there will not be this wrong vertical bar. (Intel media sdk, FFMpeg Soft decoder, etc.)
You can download the file below to reproduce this bug.
Video Codec SDK 9.1
NVIDIA GeForce RTX 2080Ti.