NVIDIA FPS throttling in unfocused windows not working anymore since a week

When multiboxing I use the NVIDIA setting to reduce the FPS of windows which are not in focus to reduce the load on my computer.

This used to work with DX11 untill recently; getting high FPS in the focused window and 30 FPS (that’s the setting I used in NVIDIA panel) in the unfocused windows.

Since a week or so this is no longer working, and I don’t get the 30 FPS that I chose in the NVIDIA panel, but rather something close to 60FPS (not exactly 60FPS, sometimes little higher, sometimes little lower).

Anyone has been able to still throttle the unfocused windows FPS, and did you do it? Perhaps some other setting broke the functionality?

Thanks in advance!