Traffic shapper HFSC compatibility issue ?

[Abhishek]

Setup tested on 
Pfsense 2.2.6 
squid with wpad (non transparent mode)
Squidguard with blacklist
snort
Limiter (to equally share bandwidth amount IP)
dont have any DMZ servers

using Traffic shapper wizard i configured HFSC and granted highest priority to web traffic and once i clicked finished within moment network began to crawl , even issue  access to pfsense via lan  ( when tried pinging it was above 2k ping and it eventually died out

Max host at that time will b 2-3 hosts  doing browsing  (no p2p or heavy applications ) ,

i read on forum i need to increase ack Q. to 10% but i couldnt even get few seconds time  to edit the shapper

Solution was forced  Reboot pfsense (since ssh also not connecting )  then quickly login and disable shapper

so is there any compatibility issue with shapper and once of the package i am using ?

(Time of issue )
max 2-3 hosts only