If I select a file in Alfred, and choose 'Copy To...' or 'Move To...' and then start typing a destination (like "desktop"), but then change my mind and try to initiate filesystem navigation by going to the beginning of what I just typed and hitting ~ (tilde) to specify my home directory, it locks up Alfred and must be killed/restarted.
This is the latest non-beta build of Alfred, and this error occurs on all systems I've tested (one Sierra and one Mojave)