Re-assigning mac address keeps disrupting wired speaker

Goodmorning,

At irregular times my KEF LS50 Wirelsess speakers lose connection. They are wired to the RBR50-sattelite.

Now I noticed that the loss of connection coincides with the log beneath: 192.168.1.10 is assigned (fixed) to my speaker. For no reason at all connection is broken exactly on the times when this happens. It happens in periods of 2-3 hours in a row, with irregular intervals. And during the week maybe one or two days this happens.

[DHCP IP: 192.168.1.10] to MAC address 84:17:15:00:b8:bd, Sunday, November 17, 2019 10:11:18
[admin login] from source 192.168.1.4, Sunday, November 17, 2019 09:55:54
[DHCP IP: 192.168.1.4] to MAC address 04:0c:ce:d9:04:16, Sunday, November 17, 2019 09:54:07
[DHCP IP: 192.168.1.10] to MAC address 84:17:15:00:b8:bd, Sunday, November 17, 2019 09:54:00
[DHCP IP: 192.168.1.16] to MAC address 80:82:23:15:df:6e, Sunday, November 17, 2019 09:39:55
[DHCP IP: 192.168.1.10] to MAC address 84:17:15:00:b8:bd, Sunday, November 17, 2019 09:28:44
[DHCP IP: 192.168.1.12] to MAC address 08:02:8e:8d:b7:5b, Sunday, November 17, 2019 09:25:09
[admin login] from source 192.168.1.4, Sunday, November 17, 2019 09:13:08
[DHCP IP: 192.168.1.10] to MAC address 84:17:15:00:b8:bd, Sunday, November 17, 2019 09:12:20

I am not an in-depth technical guy so I hope someone has a simple solution to fix this?

Thanks in advance!

Regards,

René