Unable To Get Windows 10 To Recognize Changes Made By C.R.U.

I'm trying to change the refresh rate on my 3 Dell U2415 monitors from 59.95Hz to 60Hz to sync up correctly with frame rate limiters and remove stutters that occur when these two aren't in sync.

So far I've tried the following:

- edit the existing Detailed Resolution in CRU to use a different refresh rate (tried 60, 55, and 50Hz)
- add a second Detailed Resolution in CRU with various resolutions and refresh rates
- remove all other resolutions and only leave the one Detailed Resolution with my desired resolution and 60, 55, and 50Hz refresh rates

Between all of the above items I rebooted and went into Windows 10 Settings -> System -> Display -> Advanced Display Settings to see if the resolution and/or refresh changes were available. When I realized that they were not available I reverted the changes, rebooted, and tried the next item.

After the last item I tried deleting the following registry key to see if I can get Windows to recreate the driver configuration related to the monitors
but they were recreated with the monitors default refresh rate of 59.95 and not the 60/55/50Hz that the EDIT override is asking for.

It seems that no matter what I try or do Windows 10 is just completely refusing to honor the EDID overrrides that the CRU utility is implementing.

Is this a known issue? In case it matters I'm running Windows 10 21H2 with a Nvidia RTX 4070 Super GPU with driver version 555.99 connected to 3 Dell U2415 monitors.

Thanks,
Harry