Running out of ideas....you have the very first firmware release of the 1769-AENTR at 1.001. You might try flashing it to the latest...1.003 I think. There are some technotes about the AOP compatibility with an IQ32, but since you're running a very new L85, that shouldn't be an issue.
If you browse that rack in RSLinx, what does it show? Does it show empty modules or something else?
If you browse that rack in RSLinx, what does it show? Does it show empty modules or something else?