DHCP Error after upgrade to 6.49.2

Hi,

I got a problem with my RouterBOARD 750G r3
Everything worked fine but today I upgraded to new firmware 6.49.2 and there is some problem with the DHCP server.

The DHCP server is on my bridge interface. There is a switch with some Wi-FI devices and directly connected devices.
DHCP server leasing IP only for devices connected by Wi-FI, but not for directly connected devices.

I really dunno where should I start looking for errors because there were no changes in configuration between upgrade.

Can you gimme some starting point where to look?
Thanks