Alex T wrote on Apr 29^th, 2020 at 4:05am:

logan3db wrote on Apr 29th, 2020 at 2:54am: Do you remember if your Cruise page gave you 250, or another number above that?  It gave me 315KIAS or something to that effect

Alright, I had a chance to load this up and try it out.  Granted both of these pictures were taken while on the ground, both times the FMC defaulted to a speed of 250 for the cruise.  I didn't get a chance to see what would actually happen in cruise flight, so unfortunately this was as good as I could get.

I loaded the same scenario in the FMC on the ground and I get a speed above 250 as well.  A quick edit of the ECON speed on VNAV CRZ fixes it to the way it should be.  The real FMC will perform this edit on it's own. 

I know that it goes back to my original post for a work around, but as far as I can tell this is indeed a bug.  Hope this info helps!

RW FMC 8000' cruise: https://imgur.com/a/1joQKRk
RW FMC 5000' cruise: https://imgur.com/a/MCAPD8Y
P3D FMC 5000' cruise no edit: https://imgur.com/a/bofbopL
P3D FMC 5000' cruise speed edit:https://imgur.com/a/hTHb4px