My log looks like this:
Sep 26 07:05:57 NAS kernel: vethbf83a3e: renamed from eth0
Sep 26 07:05:58 NAS kernel: eth0: renamed from veth9c122b6
Sep 26 07:06:01 NAS kernel: veth9c122b6: renamed from eth0
Sep 26 07:06:02 NAS kernel: eth0: renamed from vethc115e45
Sep 26 07:06:05 NAS kernel: vethc115e45: renamed from eth0
Sep 26 07:06:07 NAS kernel: eth0: renamed from veth8833121
Sep 26 07:06:10 NAS kernel: veth8833121: renamed from eth0
Sep 26 07:06:13 NAS kernel: eth0: renamed from vethfcb7b12
Sep 26 07:06:16 NAS kernel: vethfcb7b12: renamed from eth0
Sep 26 07:06:23 NAS kernel: eth0: renamed from veth1941e91
Sep 26 07:06:26 NAS kernel: veth1941e91: renamed from eth0
Sep 26 07:06:39 NAS kernel: eth0: renamed from veth3a3e044
Sep 26 07:06:43 NAS kernel: veth3a3e044: renamed from eth0
Sep 26 07:07:09 NAS kernel: eth0: renamed from veth13b5a96
Sep 26 07:07:11 NAS kernel: veth13b5a96: renamed from eth0
Sep 26 07:08:03 NAS kernel: eth0: renamed from veth2a876ee
Sep 26 07:08:06 NAS kernel: veth2a876ee: renamed from eth0
Sep 26 07:09:06 NAS kernel: eth0: renamed from veth56008ba
Sep 26 07:09:09 NAS kernel: veth56008ba: renamed from eth0
Sep 26 07:10:10 NAS kernel: eth0: renamed from veth5587952
Sep 26 07:10:13 NAS kernel: veth5587952: renamed from eth0
Sep 26 07:11:13 NAS kernel: eth0: renamed from veth21b20a6
Sep 26 07:11:16 NAS kernel: veth21b20a6: renamed from eth0
Sep 26 07:12:16 NAS kernel: eth0: renamed from veth4e69dbb
Sep 26 07:12:19 NAS kernel: veth4e69dbb: renamed from eth0
I dont remember having seen this in the past.
Only thing i changed resently was switching docker from macvlan to ipvlan - reason for this switch was that I still encountered crashes with macvlan in 6.12.4
//edit - this was caused by a docker container being stuck in an endless restart loop