After i removed the file and restartet it didnt took the dhcp (or the fritz didnt gave the correct one - your theory), which i doubt since all other stuff worked 110% - im using these routers since 20 years.
Im looking thru the syslog for dhcp now...
Jun 26 20:14:24 Unraid-Server dnsmasq[11178]: started, version 2.89 cachesize 150
Jun 26 20:14:24 Unraid-Server dnsmasq[11178]: compile time options: IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset no-nftset auth cryptohash DNSSEC loop-detect inotify dumpfile
Jun 26 20:14:24 Unraid-Server dnsmasq-dhcp[11178]: DHCP, IP range 192.168.122.2 -- 192.168.122.254, lease time 1h
Jun 28 03:10:44 Unraid-Server dnsmasq[17708]: started, version 2.89 cachesize 150
Jun 28 03:10:44 Unraid-Server dnsmasq[17708]: compile time options: IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset no-nftset auth cryptohash DNSSEC loop-detect inotify dumpfile
Jun 28 03:10:44 Unraid-Server dnsmasq-dhcp[17708]: DHCP, IP range 192.168.122.2 -- 192.168.122.254, lease time 1h
Jun 28 03:10:44 Unraid-Server dnsmasq-dhcp[17708]: DHCP, sockets bound exclusively to interface virbr0
Jun 29 23:56:06 Unraid-Server dhcpcd[1341]: dhcpcd-9.4.1 starting
Jun 29 23:56:06 Unraid-Server dhcpcd[1344]: DUID 00:04:ba:d0:e4:00:72:ba:11:e3:b1:7d:9c:5c:8e:87:c4:08
Jun 29 23:56:06 Unraid-Server kernel: 8021q: 802.1Q VLAN Support v1.8
Jun 29 23:56:06 Unraid-Server kernel: 8021q: adding VLAN 0 to HW filter on device bond0
Jun 29 23:56:06 Unraid-Server dhcpcd[1344]: br0: soliciting a DHCP lease
Jun 29 23:56:06 Unraid-Server kernel: NET: Registered PF_PACKET protocol family
Jun 29 23:56:06 Unraid-Server dhcpcd[1344]: br0: offered 192.168.0.21 from 192.168.0.1
Jun 29 23:56:06 Unraid-Server dhcpcd[1344]: br0: probing address 192.168.0.21/24
Jun 29 23:56:12 Unraid-Server dhcpcd[1344]: br0: leased 192.168.0.21 for 864000 seconds
Jun 29 23:56:12 Unraid-Server dhcpcd[1344]: br0: adding route to 192.168.0.0/24
Jun 29 23:56:12 Unraid-Server dhcpcd[1344]: br0: adding default route via 192.168.0.1
Jun 29 23:56:12 Unraid-Server rc.inet1: ip link set br0 up
maybe its really about vlan shit