this is what happens , sometimes when yuo use the horn of glory it stays on the call out screen until the things to shout change and then you click on the horn again and continue. however this isn't always the case, sometimes you click onto it and it exits the screen instantly then you clcik again and it'll stay on the screen for a bit then go off again. now when this happens your inventory and all the other buttons, except friends ignore music and log out, disappear meaning its impossible for you to do anything. its happened 3 times, this time i got a pic, luckily i was the defender so we just cannoned the runners, but the time before this it happened on the queen and i couldn't see the eggs in my invo so we had to leave wasting about 20 mins...

 

 

 

I had this happen to me too, kept exiting a second after clicking it and mucking up my game. After a while I just gave up on the stupid horn, though luckily it wasn't on stage 10.

i got that then i had to stay near it because i couldent call peoples roll from the battle feild. lucky im an attacker :P

the new update on runescape main wabsite, they fixed it