Causes a couple of strange regressions:
Firefox on Wayland: Clicking on url bar, backspacing over part of it then pasting (e.g. a url parameter) freezes firefox, requires kill to exit. Slack flatpak: Unresponsive to quitting via ctrl-Q, requires kill or flatpak kill
Both of these issues consistently disappear after distro-sync back to 3.38.5-1.