Hi @Vero, thanks for the reply! In following your instructions and trying to better document my issue, I discovered the issue has something to do with the way Alfred handles "show actions" with "ctrl", so I just disabled that behavior. Details follow.
Attached is a screenshot of Features > Universal Actions > General on my machine, it seems to indicate `⌥⌘\` is my shortcut for "Show Actions". But even after pressing Backspace and removing the hotkey, the behavior described above still persisted.
See how, in my screenshot, `fn` and `ctrl` are also checked? I noticed there's a feature where if you tap `fn` or `ctrl` it opens the action menu for the current text. And, perhaps due to a bug in Alfred, or perhaps due to my strange keyboard setup (I'm remapping keys with Karabiner and have Caps Lock set to Control), holding down Control to type `^H` would sometimes register as tapping Control, triggering this Show Actions menu.
The solution for me was to simply uncheck `ctrl` in the `Show Actions` section. Hopefully this is helpful to someone else in the future.