Leak of track objects to the next jobs

[AxuJIuyc]

Actions before raising this issue

• I searched the existing issues and did not find anything similar.
• I read/searched the docs

Steps to Reproduce

When annotating objects not with a shape but with a track, there is a leakage of these objects to subsequent tasks.

Example.
Let's create a task with several jobs. If you annotate images from jobs 1 to N, everything is fine. However, if you annotate from N to 1, the annotations break.

1. You previously annotated all the images in job N.
2. Then you moved on to annotating job N-1 and left the track objects on the last frame.
3. Let's go back to job N. Everything is fine in the CVAT UI.
4. Download the annotations for job N and job N-1 in any format (I tried YOLO Detect and COCO). Everything is fine.
5. BUT! If we download annotations for an entire task or project, the markup from job N-1 will also be transferred to the images from job N.

If we mark up the entire task from top to bottom, all the tracks left on job M will be transferred to jobs M, M+1, M+2...

Expected Behavior

It was expected that any object, be it a shape or a track, would be limited to its job and would not be moved to neighboring ones.

Possible Solution

No response

Context

No response

Environment