We have a strange issue that we didn't find the answer...
We have a router (RouterOS 6.47.8) with VLANs and DHCP on each of VLANs, everything works fine (computers, phones, tablets, wired and wireless).
However if we connect a second MikroTik device, reset it without configuration, create a simple bridge, add a port and configure an "/ip dhcp-client" (enabled yes), the new MikroTik never receive the IP address. Then we delete the bridge (tested as well to reset de device and try again without bridge), and use the same dhcp-client config directly on the etherX port, and work perfectly.
We tried to downgrade to RouterOS 6.46.8 thinking of a bug, but we get the same result.
The strange thing is that we have this issue only with a MikroTik with VLANs and DHCP on VLANs, no issue with config without VLANs, but at the same time we know that the DHCP server is working well as the other devices works fine.