Unable to REDO with shortcut, only works in Menu

Ctrl+Shift+Z is assigned as REDO in Illlustrator (latest) however it doesn't work, but if I use the menu, then it does.

I tried reassigning they shortcut key by clearing, and redoing it manually, but it won't take, if I try any other Ctrl Shift Key combo, it works, whether conflics arise or not, but I can't set it back to Ctrl+Shift+Z unless I reset to defaults, and even still it won't work unless I use the menu.

SPECS

• Intel Core i9-14900HX

• NVIDIA GeForce RTX 4060

• 64GB DDR5 RAM

• 1TB SSD

• All latest Adobe/Win11Pro/and video drivers
• DELL SE2419HR 24"