after I was checking my syslog I fpund that:
Aug 06 06:45:23 ulbp2681 kernel: alx 0000:02:00.0 enp2s0: fatal interrupt 0x400, resetting
Aug 06 06:45:23 ulbp2681 kernel: alx 0000:02:00.0 enp2s0: NIC Up: 1 Gbps Full
Aug 06 06:45:23 ulbp2681 dhcpcd[1226]: enp2s0: carrier lost
Aug 06 06:45:23 ulbp2681 dhcpcd[1226]: enp2s0: deleting default route via 141.35.20.1
Aug 06 06:45:23 ulbp2681 avahi-daemon[455]: Withdrawing address record for 141.35.23.78 on enp2s0.
Aug 06 06:45:23 ulbp2681 avahi-daemon[455]: Leaving mDNS multicast group on interface enp2s0.IPv4 with address 141.35.23.78.
Aug 06 06:45:23 ulbp2681 avahi-daemon[455]: Interface enp2s0.IPv4 no longer relevant for mDNS.
Aug 06 06:45:23 ulbp2681 dhcpcd[1226]: enp2s0: carrier acquired
Aug 06 06:45:23 ulbp2681 dhcpcd[1226]: enp2s0: rebinding lease of 141.35.23.78
Aug 06 06:45:25 ulbp2681 ntpd[491]: Deleting interface #84 enp2s0, 141.35.23.78#123, interface stats: received=4, sent=36, dropped=0, active_time=713 secs
Aug 06 06:45:25 ulbp2681 ntpd[491]: 5.9.159.253 local addr 141.35.23.78 -> <null>
Aug 06 06:45:25 ulbp2681 ntpd[491]: 144.76.96.7 local addr 141.35.23.78 -> <null>
Aug 06 06:45:25 ulbp2681 ntpd[491]: 129.70.132.35 local addr 141.35.23.78 -> <null>
Aug 06 06:45:25 ulbp2681 ntpd[491]: 85.10.246.226 local addr 141.35.23.78 -> <null>
Aug 06 06:45:29 ulbp2681 dhcpcd[1226]: enp2s0: leased 141.35.23.78 for 691200 seconds
Aug 06 06:45:29 ulbp2681 avahi-daemon[455]: Joining mDNS multicast group on interface enp2s0.IPv4 with address 141.35.23.78.
Aug 06 06:45:29 ulbp2681 dhcpcd[1226]: enp2s0: adding route to 141.35.20.0/22
Aug 06 06:45:29 ulbp2681 avahi-daemon[455]: New relevant interface enp2s0.IPv4 for mDNS.
Aug 06 06:45:29 ulbp2681 dhcpcd[1226]: enp2s0: adding default route via 141.35.20.1
Aug 06 06:45:29 ulbp2681 avahi-daemon[455]: Registering new address record for 141.35.23.78 on enp2s0.IPv4.
Aug 06 06:45:29 ulbp2681 NetworkManager[453]: <info>  Policy set 'enp2s0' (enp2s0) as default for IPv4 routing and DNS.
Aug 06 06:45:29 ulbp2681 dhcpcd[1226]: enp2s0: removing route to 141.35.20.0/22
Aug 06 06:45:31 ulbp2681 ntpd[491]: Listen normally on 85 enp2s0 141.35.23.78:123
Aug 06 06:45:31 ulbp2681 ntpd[491]: new interface(s) found: waking up resolver
Aug 06 06:55:47 ulbp2681 kernel: alx 0000:02:00.0 enp2s0: fatal interrupt 0x400, resetting
Aug 06 06:55:47 ulbp2681 kernel: alx 0000:02:00.0 enp2s0: NIC Up: 1 Gbps Full
....
SO how could I solve this bug in the kernel? I tried a rollback to the pivious kernel, but this didn't work eather maybe I did it wrong?
 
                