Luanti 5.12.0 is here! Perfectly on-schedule, we swear! Anyway, this time Luanti is sporting new input handling and controls, new item and entity visuals, better map performance, and more.
UPDATE: migrating the flatpak by simply updating now works for me. End up with the minetest dir symlinked to the new luanti dir. No idea what fixed it.
Looks like 5.12.0 is only available as a flatpak under a new ID: org.luanti.luanti. The old net.minetest.Minetest has stopped at 5.11.0