Sequencer Visibility Track Bug

Hi ,

Sorry I didn’t respond for some time. I came back to the project and the issue still exists in 4.12.4
While I’m not sure if I can share my 20Gb project with you, I recorded a video explaining and showing the problem .

Also, the only way I could solve the issue was deleting an object from the level outliner and adding it again. Then adding it in Sequencer as a new track and setting keyframes in the exact same positions. In that case it works. But if I move shots around and add/remove other objects eventually some random object starts to disappear again. I don't know what triggers it.