Mapping SHIFT|ALT + key on Pixelbook

[oalders]

What Operating System(s) are you running on?

Linux X11

Which Wayland compositor or X11 Window manager(s) are you using?

Debug Overlay
wezterm version: 20241204-074930-72e72318 x86_64-unknown-linux-gnu
Window Environment: X11 Sommelier
Lua Version: Lua 5.4
OpenGL: virgl (Mesa Intel(R) UHD Graphics 615 (AML-KBL)) 4.3 (Compatibility Profile) Mesa 22.3.6
Enter lua statements or expressions and hit Enter.
Press ESC or CTRL-D to exit
13:34:11.132 WARN window::os::x11::connection > Unable to resolve appearance using xdg-desktop-portal: get_appearance.read_setting: Reading xdg-portal org.freedesktop.appearance color-scheme: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.portal.Desktop was not provided by any .service files

I've set

config.enable_wayland = false
config.front_end = 'OpenGL'

Full config is at: https://github.com/oalders/dot-files/blob/main/wezterm/wezterm.lua

WezTerm version

20241204-074930-72e72318 x86_64-unknown-linux-gnu

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If I try to map

    {
        key = ']',
        mods = 'SHIFT|ALT',
        action = wezterm.action.ActivateTabRelative(1),
    },

Nothing seems to happen. If I'm in neovim it scrolls the page, so it's getting passed through directly in that case. If I'm not in neovim, I don't see anything happening. I'm trying to map this because that's the closest to the shift+command+] that I'm used to on my Mac and it's a bit painful to switch between my machines. I can map ctrl+alt+] on the Pixelbook without any issues, but that's not really solving my problem.