[Is my makita drill broken?]

Thanks for the help, and fast reply!

[Is my makita drill broken?]

Hello, 

 

so i recently bought a cordless makita combo kit ( impact driver and drill driver)

and while i was using the drill driver at work i noticed something odd, when tightening drill bits the chuck seems to click after it has been tightened? Is this normal or is there something wrong? Sometimes it would click/spin quarter turn multiple times after being fully tightened. There has been times were the drill bits have fallen out(chuck loosened by its self) Would appreciate any help