Non-evergreen trees retaining their leaves from November-March when others around don't

I’ve found many areas where tree’s that shouldn’t keep their leaves, are keeping their leaves all throughout the winter, it looks quite weird, its not just the odd tree amongst 1000s, some places it’s like every 5-10 trees.

they’re definitely not evergreen trees.

Topic Author did not complete Defect Report template. As a result, defect is less likely to be reproducible.