We have a bunch of the FE599’s in our lab (original and new firmwares) - all of the lined up in a row, most of them work just fine (with a beaming repeater between the locks and the hub). However, one of them just won’t report a user code, all else works fine.
If you’re looking for lever options check out the Yale YRD 2x6 series locks which are reliable, has a many configurable features which can be accessed via the enhanced DTH.