On Gentoo Linux.
Lust upgraded from awesome 4.3-r104 to 4.3_p20260105. No change to the rc.lua file.
No errors when awesome starts, but windows are always created « floating », whatever the screen and layout. Meta+Ctrl+Space for each window gives back the (configured) behaviour.
Reverting to 4.3-r104 (nothing else, no libraries downgrade, etc.) gets the « proper » behaviour back.