> Also the code completions are not clickable with a mouse, and using the "down" key also doesn't do anything.
Yeah, unfortunately it seems like there's a (possibly recently introduced?) bug that appears to break arrow-key/list interactions.
I was able to get code completion & command palettes to work by supplying a custom keymap I posted here: https://github.com/lapce/lapce/issues/133#issuecomment-10715...
My impression is that the non-modal keymap isn't as regularly updated given the developer's preference for modal interaction. I'm happy enough I can at least still edit the keymap to workaround the issue. :D