because as of right now it isn't causing any problems for me, it could be a weapon addon or a different camera movement addon that you have that is causing it to not work, I don't have any other camera movement addon installed for me, other than smooth view 2 and the expansions I made, and for weapons I use Arc9

I dont know if this will help, but try installing Simple Holster addon, and binding it to h, then tell me if it works properly

it didn't work when turning on smoothview 2 but worked when turned off