There is a way to change behavior and use queue pauses instead of DND, by modyfing FOP2Callbacks.pm and creating a custom context in Asterisk. It is not that simple to do, but neither that complicated. There is no standard recipe as queues and members can vary from installation to installation, and so your custom context must match your setup. Basically, in FOP2Callbacks.pm you intercept the change presence action and instead of setting and ASTDB entry for it, you originate a call to your custom context:

In FOP2Callbacks.pm flashcommand function:

    if($command eq "setastdb") {

        # Pause Local/xxxx@from-queue/n

        $return = "Action: Originate\r\n";
        $return .= "Channel: Local/".$parameters[2].":".$parameters[3];
        $return .= "\@custom-logpause-freepbx\r\n";
        $return .= "Application: Noop\r\n";
        $return .= "\r\n";
        push @allreturn, $return;
        return @allreturn;

And your custom-logpause context in the dialplan:

[custom-logpause-freepbx]
exten => _X.,1,Verbose(Exten ${EXTEN})
exten => _X.,n,Set(ACLIDNUM=${CUT(EXTEN,:,1)})
exten => _X.,n,Set(PAUSECODE=${CUT(EXTEN,:,2)})
exten => _X.,n,Set(MIAGENTE=Local/${ACLIDNUM}@from-queue/n)
exten => _X.,n,Verbose(MIAGENTE  = ${MIAGENTE})
exten => _X.,n,Verbose(ACLIDNUM  = ${ACLIDNUM})
exten => _X.,n,Verbose(PAUSECODE = ${PAUSECODE})
exten => _X.,n,GotoIf($[ "x${PAUSECODE}" = "x" ]?unpause)
exten => _X.,n(pause),QueueLog(NONE,NONE,${MIAGENTE},PAUSE,${PAUSECODE})
exten => _X.,n,PauseQueueMember(,${MIAGENTE},,${PAUSECODE})
exten => _X.,n,Set(DB(PAUSECUSTOM/${ACLIDNUM})=${PAUSECODE}:${EPOCH})
exten => _X.,n,Goto(end)
exten => _X.,n(unpause),QueueLog(NONE,NONE,${MIAGENTE},UNPAUSE)
exten => _X.,n,UnPauseQueueMember(,${MIAGENTE})
exten => _X.,n,NoOp(${DB_DELETE(PAUSECUSTOM/${ACLIDNUM})})
exten => _X.,n(end),Verbose(Fin log pausa)
exten => _X.,n,Hangup