Spawns many object trackers on same object

## System information (version)
- OpenCV => (4.2.0)
- Operating System / Platform => Android 10
- Compiler => Android NDK r20 (clang)

## Expected Behavior
One object - one tracker

## Current Behavior
One object - many buggy trackers

## Steps to Reproduce
1. Start android app
2. Try to detect more than one marker