I can confirm the DHCP behavior described by Splash.
Having a DHCP server on a (SW only - CCR1009) bridge interface stops the DHCP server from handing out leases, with all just in the waiting state.
Adding accept firewall rules for UDP port 67 on the input chain for the needed interfaces gets it up and running.

After update 6.41.1 my RB951Ui 2HnD has alway reboot, and i cant winbox to interface address. How can I fix this?

Can you winbox to MAC address?

Notice for those, how are using hotspot with custom pages.

After update from 6.41 to 6.41.1 path to hotspot files has changed. It was 'flash' before, now it's 'disk'.
Did not find this in changelog.
Got hotspot misfunction, because I use custom redirect pages.

Just bear it in mind.

I have to downgrade firmware on cAP and Hex POE wireless routers to 6.41.
In IP Hotspot settings I select correct path from dropdown menu, i.e. 'disk/custom-hotspot'. But it save path as 'flash/disk/custom-spotspot' and display default auth page to connected wireless stations. This behavior is either using WinBox or CLI.

This look like a bug.

On cAP Lite 6.41.1 path saves correctly.

Version 6.41.2 has been released:
viewtopic.php?f=21&t=130626