Can't redo in Glaximate

I am using Glaximate on NixOS 25.11 with Hyprland. At first, I tested with the latest stable release (0.5.80), and then later with the latest git revision (61ea1b8b5e4349af93dbb2233ea83b8c6c8929bf). But to no avail - neither of them allow me to use redo (ctrl+shift+z, from the menu button, even remapping does not work). I am pretty sure something is up with key triggering since I can redo from the undo history view. Please do tell me if I should create a bug report for this.