How many firewall rules do you have?
Is there something particularly complex about your setup?
Have a look in the log files, anything of interest?
10 rules in queue, connection tracking disabled, maybe 15 rules in firewall , mostly drop from outside like dns , winbox.
2 full feed bgp sessions and 3 to ix.
uptime: 2d2h24m3s
version: 6.48.3 (stable)
build-time: May/25/2021 06:09:45
free-memory: 14.6GiB
total-memory: 15.6GiB
cpu: Intel(R)
cpu-count: 12
cpu-frequency: 1895MHz
cpu-load: 10%
free-hdd-space: 110.8GiB
total-hdd-space: 110.9GiB
write-sect-since-reboot: 807256
write-sect-total: 807256
architecture-name: x86_64
board-name: x86
platform: MikroTik
Traffic summary: 850Mbps / 70Mbps DL/UL
In logs nothing special, some drops logged.
This is Server, 2U INTEL, Xeon CPU, 16GB RAM. 3 card Intel x520-DA2 and integrated onboard 2x 1GE.