Hello everyone! I'm looking to hopefully get some help to fix these issues I have with doing an IFR flight. One thing I'm trying to successfully accomplish is put in an entire LNAV route on the FMC and Legs page, as well as fine the correct SIDS transition on departure. Whenever I put in a certain Sid's departure transition, the line always cuts off and then I lose core so I have to use ATC for heading purposes. Another issue I'm having is successfully completing an ILS landing. As I'm approaching the runway, my plane immediately drops. The autopilot is engaged by itself, sometimes I can't climb and the plan stays in one position. Any help for these two issues would be great!