"Tracking error" in OpenCV TrackerMIL tracker when tracking many concurrently moving objects

[archibald1418]

Actions before raising this issue

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

Steps to Reproduce

On Google Chrome:

• Create a dataset with several objects moving in frame
• Load OpenCV and start tracking it with TrackerMIL as per docs
• Repeat frame by frame
• For each new tracked object add a TrackerMIL tracker and continue frame by frame
• Error starts appearing from around 6 objects being tracked simultaneously (maybe it's my Chrome though, could happen later)
• Also, already with a smaller number of objects, TrackerMIL gets buggy while an object is leaving the frame or some shapes start lagging behind their objects (this was also an issue in Fixed TrackerMIL one frame late #7399)

Expected Behavior

No tracker lags and no 'Tracking errors' pop up

Possible Solution

No response

Context

No response

Environment

No response