Performance Issue when use heavy task or gaming. It not charging and when it above 92% it drop fps all drop

I'm using a Dell laptop and it doesn't draw full power when I play games or run heavy tasks. When the battery drops to 91%, the system starts throttling, which causes the laptop to lag.
I checked with HWiNFO, and when I’m gaming the system basically uses only the AC adapter power and not charging. My laptop is showing the LED code 3 amber and 8 white, so I’m not sure what issue it’s having. From what I’ve researched, this model supports Hybrid Power Design, but it shouldn’t be throttling — it should just use both the battery and the AC adapter together to provide enough power
I use dell precision 7560