broken trust chain with my DNS setup

[Peter]

Hi hope someone can help here is my setup on Bind 9.17.10.

https://bridgemode.bounceme.net/DNS%20BIND%20setup.html 
<https://bridgemode.bounceme.net/DNS%20BIND%20setup.html>

https://bridgemode.bounceme.net/DNS%20BIND%20setup2.txt

When working what happens is:

first lookup

Lookup by 127.0.0.1 on main PC then bind forwards to 192.168.255.53 from 
192.168.255.56 then HTPC by bind forwards to 192.168.255.55 from 
192.168.255.53 Main PC then does the recursion lookup in the given view/ACL

second lookup

Lookup by 192.168.255.53 on main PC from 192.168.255.55 then HTPC by 
bind forwards to 192.168.255.56 from 192.168.255.54 Main PC then does 
the recursion lookup in the given view/ACL

*issue*

What happens is this after many days of working fine:

querylog yes;

client @00000227150F1FE8 127.0.0.1#55768 (community.zyxel.com): view 
loopbackPC: query failed (broken trust chain) for 
community.zyxel.com/IN/A at c:\builds\isc-private\bind9\lib\ns\query.c:7581

^This is from windows event viewer

Only way to fix is to restart bind on the main PC.

Thanks if you can help

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