Intune Grace Period Not Working

When I try to use the "restart grace period" for a win32 app, I get a strange error. The notifcation pops up at the correct time, but says" the computer will restart in -2147483648 minutes"

I've configured it to "Device restart grace period" is 15 minutes. "Select when to display the restart countdown dialog box before the restart occurs" is set to 5 minutes. "Allow user to snooze the restart notification" is set to "NO".

The reboot is fine but the restart notification is clearly off with the restart timer. It works perfectly fine on Windows 11 but has the bug on Windows 10.

Has anyone seen this?

Same issue here: https://learn.microsoft.com/en-us/answers/questions/1304408/restart-grace-period-not-working-as-intended-devic