(Reposting because I put my original thread in the wrong category.)
Observed: A wizard's Arcane Recovery ability does not let you choose what spell slots to recover.
Expected: You should be able to pick slots that total one-half your wizard level. E.g. A 6th level wizard should be able to pick one of: three 1st-level slots, one 1st- and one 2nd-level slot, or one 3rd-level slot.