setSelectedColor doesn't work on barsets added to QBarSeries with insert method

Selection color doesn't work for barsets added to QBarSeries with insert method. Instead of insert, if I use QBarSeries::append then selection color reflects as expected. Note: It happens for both C++ and Python APIs.

Using insert :

Screen Recording 2024-12-19 at 3.47.51 PM.mov

Using append insted of insert (rest of the script is same) : 

Screen Recording 2024-12-19 at 3.48.37 PM.mov

Attaching the python script.

qt_bug_chart.py

You can also find c++ implementation : cpp_sample_code.cxx