(F45 Workstation) how to hide grub

Hello, since i had the wonderful idea to update to the f45 prerelease the grub menu is always shown

yes, i have two system installed (one on a secondary ssd) but the grub was never shown until the upgrade to f45

the setting “set menu_auto_hide=1” is already set, but did not help me unfortunately

maybe someone can help me in getting everything back to normal, where the grub menu is not shown?

thanks