Ventoy persistence feature depends on that the distro supports persistence itself.
If the distro doesn't support persistence, then the persistence feature will not take effect.
As I known, manjaro ISO doen't support persistence itself.
Only the distros in the list are tested and guaranteed to work now.
https://www.ventoy.net/en/plugin_persistence.html
I suggest you use vhd/vdi for manjaro https://www.ventoy.net/en/plugin_vtoyboot.html
It's a real manjaro enviroment like installed in a physical disk.
If the distro doesn't support persistence, then the persistence feature will not take effect.
As I known, manjaro ISO doen't support persistence itself.
Only the distros in the list are tested and guaranteed to work now.
https://www.ventoy.net/en/plugin_persistence.html
I suggest you use vhd/vdi for manjaro https://www.ventoy.net/en/plugin_vtoyboot.html
It's a real manjaro enviroment like installed in a physical disk.