Wed Jan 10, 2018 5:01 pm by MiRai
Right, so I'm going to assume that Alt+H isn't bound to anything in game. If it was bound to something, then whatever it was bound to would fire off, but in this case, because Alt+H isn't bound to anything (e.g. Interact with Mouseover), the modifier gets dropped and the "H" key is sent to the game clients, which is what is causing the PvP pane to open.
Based on your current profile you're going to have a difficult time binding Alt+H to anything because it's currently set as a Hotkey, in ISBoxer, in the "Always On" Key Map. You've set up both the basic Repeater method, as well as the custom Mapped Key SetView method, and if you want to continue to use the custom Mapped Key that is bound to MouseWheelUp, then you need to remove the Hotkey on "Activate Mouse Repeat." Then, bind Alt+H to Interact with Mouseover, and enjoy gathering on your team.