Certain objects "flickering" from MSAA

[keqe]

So here is a video of my problem. It isn't harmful in any way but I worry if it is a cause from something bigger issue. As I said in the title it seems to be from MSAA. I use 160% render scale (1.6x SSAA?) with MSAA too and some nvidia's own PPAA from nvidia panel. Disabling MSAA seems to "fix" this issue, but is it just a bug of the game, or something worse?

[Vash The Stampede]

When in doubt, try using SweetFX.