Can't save 4K resolution with custom vertical blank total using Nvidia's Custom Resolution Utility

I heard that the Spectrum has support for quick frame transport for low crosstalk with motion blur on. I am trying to enable it, using Nvidia’s Custom Resolution Utility (CRU) to increase the Vertical pixel total from the default 2250 to 5400, as was shown with a blur busters post before.

Default
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Increased Vertical Total
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However, while it seems to be a valid configuration, and even gives me the prompt to save it, after clicking “Yes”, the new “added” resolution doesn’t show up anywhere, implying that it somehow wasn’t saved.

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Furthermore, when running Blur Busters Eve Strobe Utility, it still reports a vertical total of only 2250.

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If anyone has any idea on how to make the change on the Vertical Total stick, that would be super helpful. I’m running a 3080, and here are my current settings.

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Thanks!

Try copying all of the timings.
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