I’ve had no issues but you have to propperly initialize the system by not hitting TOGA until aligned an in position with the proper runway set in the FMS. If you don’t things will get wonky. Also out west in the desert there’s fewer VOR/Dme to define position. In DFW as well the FMS has Jen1.Jen as the arrival from the west but it’s called on the charts and by ATC the Glenrose. If you don’t know JEN is Glenrose it can be confusing.

According to the email I was right as to the cause. Rockwell has a “part” (chip) replacement produced in the plant across the boarder by Mexico that as soon as disseminated and installed will fix this mess. Mx told me ELP had the part. I don’t know the install procedure or time or if this is even completely true but it sounds about right.