A very annoying ADS problem

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By default, right mouse click is ADS ( scope in, aim down sight ), and hold right mouse is 3rd person aiming. I changed my settings to the opposite because I like to use 3rd person more. The thing is, if I click my mouse it is VERY frequent to get failed aiming. I will do the animation and fail halfway returning back to outside aiming.

The first half of the clip is me trying to 3rd person aim (Click). After that I turn around and show you what ADS is like for me (Hold). These problems does not matter if I am using default or changed settings. Any ideas? Does others have this problem? I'll be sharing a video through discord link because it is more convenient, my game is not that dark though in my actual screen.

Download Link:
https://cdn.discordapp.com/attachments/366952770621800448/1265961896981561427/Not_One_Problem.mp4?ex=66a36a64&is=66a218e4&hm=d626ae653b176a58b6bd496ed4880dd7870f4d0ac3c6a00a5d383408d12e7ac0&

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Also, inmagine getting unscope for no reason while in first person ADS. The video is just showing the problem, inmagine experiencing these in real combat...