Edit server.cfg anticheat to 0, player.Ammo is not update to server-side
If enable anticheat in server.cfg, it's works
else not works
This was fixed since (2020-12-24) https://forum.vc-mp.org/index.php?topic=8215.0, update your server to latest of today v34.
Windows Server (x86) (http://v04.adtec.ovh/server/VCMP04_server_v34_win32.zip)
Windows Server (x64) (http://v04.adtec.ovh/server/VCMP04_server_v34_win64.zip)
Linux Server (x86) (http://v04.adtec.ovh/server/VCMP04_server_v34_linux32.zip)
Linux Server (x64) (http://v04.adtec.ovh/server/VCMP04_server_v34_linux64.zip)