I'm still on the issue. I don't have any other network card to put on it. I've been keeping on date all the new releases of the version of my pfsense machine, but there is no solution yet, only way is to reboot the machine.
It's OK that problem is a driver bug, is there any way to report to developers to solve it?
Internet forums tell that there are patches to resolve this on FreeBSD OS, but I don't now how to put this one on a pfsense machine.
Thanks jimp for your response.