I think it's because that keyboard combination on your keyboard layout triggers a specific shortcut, which prevented @ or # from being entered. For example, have you noticed that text on that line grew bigger?
The workaround we have for now is to change a setting so that those conflicting keyboard shortcuts map to something else. I took a look at the Spanish keyboard layout, and it looks like the Czech option in Settings - Preferences - Input should work.
Could you try that and let me know if that fixes the issue?