Let's see if somebody can't help me or is having the same problem as me, I'm starting to get desperate. So I'm playing with an ASUS laptop with i5-8300H @2.3Ghz, Geforce GTX 1050 4gb and 8gb RAM.
The game runs usually well except when I play crucible or Gambit, as soon as I see a player or a player gets close to me I go from 50-60 fps to 10-20 fps (even when I just launched de laptop and the game, so may be it is not a cooler problem)
I tried almost everything, it doesn't matter if I lower the settings (currently playing on the lowest settings with fps cap at 56 and FOV 80). Also I reinstalled the game, reinstalled the drivers, removed the windows game bar, give the game more priority trough the task manager, edited the energy settings on windows, even I changed the audio settings (Some players found this solution quite useful).
If there is any more solution that helped to anybody, let me know, thank you in advance.