Hi rckiller, I had the same problem with TFAR.
You can fix it if you comment or delete the following lines on init_player.sqf
//Line 120-135
/*
{
_event = _x;
_namespaceId = "BIS_stackedEventHandlers_";
_namespaceEvent = _namespaceId + _event;
_data = missionNameSpace getVariable [_namespaceEvent, []];
{
private ["_itemId","_allowed"];
_allowed = _data select count _data -1 select 0;
if (_allowed in StackedEHkeysWhiteList) then {
_data deleteAt count _data -1;
}else{
_itemId = [_x, 0, "", [""]] call BIS_fnc_param;
[_itemId,_event] call bis_fnc_removeStackedEventHandler;
};
} foreach _data;
} forEach ["oneachframe", "onpreloadstarted", "onpreloadfinished", "onmapsingleclick", "onplayerconnected", "onplayerdisconnected"];
*/