these problems are weird to me but somewhat familiar
I've gone 31,115 in 16 months, 86% on superchargers 7,280kwh and 14% L2 home charger 1,140kwh
my longest trip was ~3,500 miles (5,650km) (5 days after we got MYLR) and a lot of 2,200mile and 600 - 700 mile and a few 290 mile
(don't bother with Key West, Florida, USA. crowded except to say "I've been there" (but do get some local honey!)
what I have found is put in ultimate destination, then a bit later "edit" trip, "add stop" (home)
If it's acting "weird" just hit "edit trip", and do nothing except OK. It' usually behaves
I also touch the screen and hit the supercharger button for "close by superchargers" tap one, then X out of it
the computer will "think" a bit and settle down more or less correctly
hope this helps or is vaguely on topic