No IPv6 leases at all, what's wrong?

Installing and Using OpenWrt Network and Wireless Configuration
1

Ahoy.
Currently i was running a mwan3 setup, using 2 WAN connections in order to load balance.
Now i got a 1000Mbps/40Mbps DOCSIS connection, and i'd like to keep running IPv6.
But there is a problem. I got DHCPv6 in server mode enabled on my interfaces, but all my clients receive their IPv6 addresses.
Unfortunately, according to LuCi, there are no DHCPv6 leases at all, so i'm not able to reach my clients in my local network using IPv6. What's the problem here? Why is there no DHCPv6 lease at all?
That's my Trusted network interface taken from /etc/config/dhcp

config dhcp 'trusted'
	option interface 'trusted'
	option limit '150'
	option leasetime '12h'
	option start '25'
	option ra 'server'
	option dhcpv6 'server'
	option ra_management '1'

And /etc/config/network

config interface 'trusted'
	option proto 'static'
	option type 'bridge'
	option ifname 'eth6 eth7 eth0.3'
	option stp '1'
	option ipaddr '192.168.3.1'
	option netmask '255.255.255.0'
	option ip6assign '60'
2

What version are you running? There was a bug in luci that caused it not to report all the DHCP leases. It was recently fixed:

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