It seems to be related to timing. If I ⌘-C and ⌘-V right afterwards, nothing happens. I don’t see any log messages either indicating I pasted. Experimenting some more, it doesn’t work until I wait for maybe 5 seconds between ⌘-C and ⌘-V.
is the space fully loaded, or are you doing this while the space is loading?
The space is fully loaded.