r.msaa seems no effect 4.16

I have migrated my project from 4.15 to 4.16.
I use the console command: r.msaa count 1
In 4.15 the result was great in VR but he is really bad and seems to have no effect when i change the values in 4.16. (forward shading mode)

The value used changed in 4.16.

Prior to 4.16, r.MSAACount 1, disabled msaa and enabled TAA.

In 4.16, r.MSAACount 0 disabled msaa and enables TAA. r.MSAACount 1 disabled msaa but does not enable TAA.

Nice Thanks !