When you have this kind of configuration:
/interface vlan
add interface=bridge-LAN name=INET vlan-id=117
add interface=bridge-LAN name=MGMT vlan-id=105
with something like this following
/ip dhcp-server
add add-arp=yes address-pool=pool-INET disabled=no interface=INET name=server-INET src-address=192.168.53.254
/ip address
add address=10.90.90.254/24 interface=MGMT network=10.90.90.0
add address=192.168.53.254/24 interface=INET network=192.168.53.0
that means that device has to interact with VLANs and bridge interface (as already mentioned by @conymercier) has to be tagged member of said VLAN(s). In OP’s case that’s actually interface bridge-LAN.
More about bridge personalities in ROS.