I've had my DJI MAVIC PRO For about 5 years for now, flown it maybe 100+ times, stopped flying for about 3 years, but i just got into flying again and since i got into flying, i realized that the drone has alot lower range, when i was about 600 ft distance, it already gave me a warning "Low RC Connection, Adjust antenna", I adjusted the antenna, faced to the direction of my drone, but it keeps saying that i have low connection to the drone, if anyone could help, please help, that would mean alot, thanks!

If you have Discord, and you would wanna DM Me on discord to help with my problem, Feel free! My user is Pilot_Damar#5511

Hi there. Thank you for reaching out and we're sorry for the trouble that this has caused. In this case, we strongly suggest downloading the DJI Assistant 2 software (Kindly please refer to the link below) and please update/refreshing the firmware of both aircraft and remote controller to the latest version and check if the issue persists.  Please keep us posted. Thank you.

https://www.dji.com/downloads/softwares/assistant-dji-2

I connected into DJI Assistant 2 but there is no firmware that needs to be updated, anyhow, i do live in some sort of a dense tree area and does that makes a effect?