Nighthawk R7000 're-boot/initialize' randomly

Hi all - my first post here.

I have had my Nighthawk R7000 for several years without ANY problems or issues.  But now i get reboots/initializes randomly almost every day - and at different times during the day. Sometimes several times in one day, sometimes the router can run for several days without the error.

It is not just loosing the internet, but the whole network is down. And after the 're-boot', the log is empty and start all over, so i can't see what is leading up to the re-boot (or what ever it is).

Here is 2 examples of logs after reboot:

[Time synchronized with NTP server] Saturday, Jun 05,2021 08:42:45
[Internet connected] IP address: 92.246.18.243, Saturday, Jun 05,2021 08:42:45
[Internet disconnected] Saturday, Jun 05,2021 08:42:45
[DHCP IP: (10.0.0.7)] to MAC address 00:24:2C:77:E9:A8, Saturday, Jun 05,2021 08:42:40
[Admin login] from source 10.0.0.110, Saturday, Jun 05,2021 08:42:36
[DHCP IP: (10.0.0.5)] to MAC address AE:84:C6:F7:08:1B, Saturday, Jun 05,2021 08:42:35
[DHCP IP: (10.0.0.4)] to MAC address 3C:61:05:D0:D8:37, Saturday, Jun 05,2021 08:42:30
[DHCP IP: (10.0.0.3)] to MAC address 74:3A:EF:CE:19:4E, Saturday, Jun 05,2021 08:42:30
[DHCP IP: (10.0.0.2)] to MAC address E0:94:67:3B:4F:84, Saturday, Jun 05,2021 08:42:29
[Initialized, firmware version: V1.0.11.106] Saturday, Jun 05,2021 08:42:23

[Admin login] from source 10.0.0.110, Monday, May 31,2021 18:51:57
[DHCP IP: (10.0.0.8)] to MAC address 00:24:2C:77:E9:A8, Monday, May 31,2021 18:42:02
[DHCP IP: (10.0.0.9)] to MAC address BA:C8:8D:EA:1D:4C, Monday, May 31,2021 18:41:05
[DHCP IP: (10.0.0.7)] to MAC address 00:22:61:6D:48:58, Monday, May 31,2021 18:39:39
[DHCP IP: (10.0.0.5)] to MAC address E0:94:67:3B:4F:84, Monday, May 31,2021 18:39:24
[DHCP IP: (10.0.0.4)] to MAC address 3C:61:05:D0:D8:37, Monday, May 31,2021 18:39:23
[Time synchronized with NTP server] Monday, May 31,2021 18:39:12
[Internet connected] IP address: 92.246.18.243, Monday, May 31,2021 18:39:12
[Internet disconnected] Monday, May 31,2021 18:39:11
[DHCP IP: (10.0.0.3)] to MAC address 92:17:37:90:B9:25, Monday, May 31,2021 18:39:07
[DHCP IP: (10.0.0.2)] to MAC address AC:84:C6:F7:08:1B, Monday, May 31,2021 18:38:53
[Initialized, firmware version: V1.0.11.106] Monday, May 31,2021 18:38:50

What can i do?  Do i need to buy a new router?

Best regards

Henrik Hansen - Silkeborg - Denmark