IPv6 Driving me crazy

And not just run-of-the-mill crazy, but full-on frothing-at-the-mouth psycho...

I have an ERX SFP. I can get IPv6 to work, but it invariably stops working after a day or so. Devices on switch0 (the main LAN) work and then stop working. My laptop, for example, refuses to pick up an IPv6 address now but I'm sure rebooting the router will fix it.

david@RoutyMcRouterson# show interfaces ethernet eth0 dhcpv6-pd
 pd 0 {
     interface switch0 {
         prefix-id :DC
         service slaac
     }
     interface switch0.10 {
         prefix-id :A1
         service slaac
     }
     prefix-length 56
 }
 rapid-commit enable

david@RoutyMcRouterson# show interfaces switch switch0 ipv6
 dup-addr-detect-transmits 1
 router-advert {
     cur-hop-limit 64
     link-mtu 0
     managed-flag false
     max-interval 300
     other-config-flag false
     prefix ::/64 {
         autonomous-flag true
         on-link-flag true
         valid-lifetime 2592000
     }
     reachable-time 0
     retrans-timer 0
     send-advert true
 }

david@RoutyMcRouterson# show interfaces switch switch0 vif 10 ipv6
 dup-addr-detect-transmits 1
 router-advert {
     cur-hop-limit 64
     link-mtu 0
     managed-flag false
     max-interval 300
     other-config-flag false
     prefix ::/64 {
         autonomous-flag true
         on-link-flag true
         valid-lifetime 2592000
     }
     reachable-time 0
     retrans-timer 0
     send-advert true
 }

david@RoutyMcRouterson# run show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface    IP Address                        S/L  Description
---------    ----------                        ---  -----------
eth0         198.255.225.125/19                u/u  Internet
             2604:6000:9fc0:3b:3131:7a62:8a04:5015/128
eth1         -                                 u/D  Local
eth2         -                                 u/D  Local
eth3         -                                 u/u  Local
eth4         -                                 u/u  Local
eth5         -                                 u/D
lo           127.0.0.1/8                       u/u
             ::1/128
switch0      192.168.4.1/24                    u/u  Local
             2604:6000:9ec0:e6dc:822a:a8ff:fe1d:8c3b/64
switch0.10   192.168.15.1/24                   u/u  Guest
             2604:6000:9ec0:e6a1:822a:a8ff:fe1d:8c3b/64
vtun0        10.8.0.1/24                       u/u  Home VPN Server
vtun1        10.9.0.3/24                       u/u  Meadows VPN

Both switch interfaces are getting valid addresses with 64 bit prefixes on their designated prefixes. Why aren't LAN devices getting addresses??? 

david@RoutyMcRouterson# show firewall ipv6-name WANv6_LOCAL
default-action drop
description "WAN inbound to router"
enable-default-log
rule 10 {
action accept
description "Allow established/related"
state {
established enable
related enable
}
}
rule 20 {
action drop
description "Drop invalid"
state {
invalid enable
}
}
rule 30 {
action accept
description "Allow IPv6 ICMP"
protocol ipv6-icmp
}
rule 40 {
action accept
description "Allow DHCPv6"
destination {
port 546
}
protocol udp
source {
port 547
}
}

david@RoutyMcRouterson# show firewall ipv6-name WANv6_IN
default-action drop
enable-default-log
rule 10 {
action accept
description "allow established/related"
state {
established enable
related enable
}
}
rule 20 {
action drop
description "Drop invalid"
state {
invalid enable
}
}
rule 30 {
action accept
description "Allow ICMPv6"
protocol ipv6-icmp
}

Here is what my laptop shows when connected to the main network:

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . : elbonia
   Link-local IPv6 Address . . . . . : fe80::e539:c713:f687:4c1e%6
   IPv4 Address. . . . . . . . . . . : 192.168.4.120
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.4.1

Wireless LAN adapter Wireless Network Connection:

 Connection-specific DNS Suffix . : elbonia-guest
 Link-local IPv6 Address . . . . . : fe80::e539:c713:f687:4c1e%6
 IPv4 Address. . . . . . . . . . . : 192.168.15.101
 Subnet Mask . . . . . . . . . . . : 255.255.255.0
 Default Gateway . . . . . . . . . : 192.168.15.1 

 I'd really appreciate any help. ISP is Time Warner. Thanks.