3x [ADDON_ACTION_BLOCKED] AddOn 'ItemRack' tried to call the protected function 'AttemptToSaveBindings()'.
!BugGrabber\BugGrabber.lua:519: in function <!BugGrabber\BugGrabber.lua:519>
[C]: in function AttemptToSaveBindings' ItemRack\ItemRack-3.46.nil.lua:1910: in function SetSetBindings'
ItemRack\ItemRack-3.46.nil.lua:465: in function InitCore' ItemRack\ItemRack-3.46.nil.lua:203: in function func'
ItemRack\ItemRack-3.46.nil.lua:877: in function `OnUpdate'
[string ":OnUpdate"]:1: in function <[string ":OnUpdate"]:1>

I guess it's a error when saving the hotkeys in combat and it should be fixed with 3.47, thanks for reporting it.