DEC3862 network interfaces outages

[netuser]

I have owned a DEC3862 device for about half a year. However, after deploying the role as a new firewall to the production environment, I am experiencing random network interfaces outages. The problematic network interface pretends to be fine, but the gateway or network behind it is unavailable. The ifdown and ifup commands will not help. Also, the "Reload all services" function does not solve anything. The only thing that helps is restarting the operating system. Outages occur after a few days. My configuration is DUALWAN with dualstack IPv4/Ipv6 protocol. All network cards are Intel(R) Ethernet Controller I225-V. The firewall is pre-installed with the OPNsense 24.4 operating system and with the default configuration set by the manufacturer.

[netuser]

I would also like to add that after the outage, from the point of view of the opposite party (switch), the firewall connects with full duplex and at a lower speed of 10 Mbit/s, but without communication. Or there is also a "port flapping" effect.
The previous firewall, running on Debian GNU Linux OS and with Lenovo hardware, did not suffer from the above symptoms. I've been running a small firewall with OPNsense and PCEngines APU2 hardware for several years without a problem.
I'm disappointed that they install common Intel(R) Ethernet Controller I225-V network cards, which are known for their problems, in devices with "business and enterprise" class ambitions.